Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

14 files changed, 5455 insertions, 0 deletions

diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig
new file mode 100644
index 00000000000..72f2b466b81
--- /dev/null
+++ b/drivers/mmc/Kconfig
@@ -0,0 +1,63 @@
+#
+# MMC subsystem configuration
+#
+
+menu "MMC/SD Card support"
+
+config MMC
+	tristate "MMC support"
+	help
+	  MMC is the "multi-media card" bus protocol.
+
+	  If you want MMC support, you should say Y here and also
+	  to the specific driver for your MMC interface.
+
+config MMC_DEBUG
+	bool "MMC debugging"
+	depends on MMC != n
+	help
+	  This is an option for use by developers; most people should
+	  say N here.  This enables MMC core and driver debugging.
+
+config MMC_BLOCK
+	tristate "MMC block device driver"
+	depends on MMC
+	default y
+	help
+	  Say Y here to enable the MMC block device driver support.
+	  This provides a block device driver, which you can use to
+	  mount the filesystem. Almost everyone wishing MMC support
+	  should say Y or M here.
+
+config MMC_ARMMMCI
+	tristate "ARM AMBA Multimedia Card Interface support"
+	depends on ARM_AMBA && MMC
+	help
+	  This selects the ARM(R) AMBA(R) PrimeCell Multimedia Card
+	  Interface (PL180 and PL181) support.  If you have an ARM(R)
+	  platform with a Multimedia Card slot, say Y or M here.
+
+	  If unsure, say N.
+
+config MMC_PXA
+	tristate "Intel PXA255 Multimedia Card Interface support"
+	depends on ARCH_PXA && MMC
+	help
+	  This selects the Intel(R) PXA(R) Multimedia card Interface.
+	  If you have a PXA(R) platform with a Multimedia Card slot,
+	  say Y or M here.
+
+	  If unsure, say N.
+
+config MMC_WBSD
+	tristate "Winbond W83L51xD SD/MMC Card Interface support"
+	depends on MMC && ISA
+	help
+	  This selects the Winbond(R) W83L51xD Secure digital and
+          Multimedia card Interface.
+	  If you have a machine with a integrated W83L518D or W83L519D
+	  SD/MMC card reader, say Y or M here.
+
+	  If unsure, say N.
+
+endmenu
diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile
new file mode 100644
index 00000000000..89510c2086c
--- /dev/null
+++ b/drivers/mmc/Makefile
@@ -0,0 +1,22 @@
+#
+# Makefile for the kernel mmc device drivers.
+#
+
+#
+# Core
+#
+obj-$(CONFIG_MMC)		+= mmc_core.o
+
+#
+# Media drivers
+#
+obj-$(CONFIG_MMC_BLOCK)		+= mmc_block.o
+
+#
+# Host drivers
+#
+obj-$(CONFIG_MMC_ARMMMCI)	+= mmci.o
+obj-$(CONFIG_MMC_PXA)		+= pxamci.o
+obj-$(CONFIG_MMC_WBSD)		+= wbsd.o
+
+mmc_core-y := mmc.o mmc_queue.o mmc_sysfs.o
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
new file mode 100644
index 00000000000..e4002632825
--- /dev/null
+++ b/drivers/mmc/mmc.c
@@ -0,0 +1,914 @@
+/*
+ *  linux/drivers/mmc/mmc.c
+ *
+ *  Copyright (C) 2003-2004 Russell King, All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/completion.h>
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/pagemap.h>
+#include <linux/err.h>
+
+#include <linux/mmc/card.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/protocol.h>
+
+#include "mmc.h"
+
+#ifdef CONFIG_MMC_DEBUG
+#define DBG(x...)	printk(KERN_DEBUG x)
+#else
+#define DBG(x...)	do { } while (0)
+#endif
+
+#define CMD_RETRIES	3
+
+/*
+ * OCR Bit positions to 10s of Vdd mV.
+ */
+static const unsigned short mmc_ocr_bit_to_vdd[] = {
+	150,	155,	160,	165,	170,	180,	190,	200,
+	210,	220,	230,	240,	250,	260,	270,	280,
+	290,	300,	310,	320,	330,	340,	350,	360
+};
+
+static const unsigned int tran_exp[] = {
+	10000,		100000,		1000000,	10000000,
+	0,		0,		0,		0
+};
+
+static const unsigned char tran_mant[] = {
+	0,	10,	12,	13,	15,	20,	25,	30,
+	35,	40,	45,	50,	55,	60,	70,	80,
+};
+
+static const unsigned int tacc_exp[] = {
+	1,	10,	100,	1000,	10000,	100000,	1000000, 10000000,
+};
+
+static const unsigned int tacc_mant[] = {
+	0,	10,	12,	13,	15,	20,	25,	30,
+	35,	40,	45,	50,	55,	60,	70,	80,
+};
+
+
+/**
+ *	mmc_request_done - finish processing an MMC command
+ *	@host: MMC host which completed command
+ *	@mrq: MMC request which completed
+ *
+ *	MMC drivers should call this function when they have completed
+ *	their processing of a command.  This should be called before the
+ *	data part of the command has completed.
+ */
+void mmc_request_done(struct mmc_host *host, struct mmc_request *mrq)
+{
+	struct mmc_command *cmd = mrq->cmd;
+	int err = mrq->cmd->error;
+	DBG("MMC: req done (%02x): %d: %08x %08x %08x %08x\n", cmd->opcode,
+	    err, cmd->resp[0], cmd->resp[1], cmd->resp[2], cmd->resp[3]);
+
+	if (err && cmd->retries) {
+		cmd->retries--;
+		cmd->error = 0;
+		host->ops->request(host, mrq);
+	} else if (mrq->done) {
+		mrq->done(mrq);
+	}
+}
+
+EXPORT_SYMBOL(mmc_request_done);
+
+/**
+ *	mmc_start_request - start a command on a host
+ *	@host: MMC host to start command on
+ *	@mrq: MMC request to start
+ *
+ *	Queue a command on the specified host.  We expect the
+ *	caller to be holding the host lock with interrupts disabled.
+ */
+void
+mmc_start_request(struct mmc_host *host, struct mmc_request *mrq)
+{
+	DBG("MMC: starting cmd %02x arg %08x flags %08x\n",
+	    mrq->cmd->opcode, mrq->cmd->arg, mrq->cmd->flags);
+
+	WARN_ON(host->card_busy == NULL);
+
+	mrq->cmd->error = 0;
+	mrq->cmd->mrq = mrq;
+	if (mrq->data) {
+		mrq->cmd->data = mrq->data;
+		mrq->data->error = 0;
+		mrq->data->mrq = mrq;
+		if (mrq->stop) {
+			mrq->data->stop = mrq->stop;
+			mrq->stop->error = 0;
+			mrq->stop->mrq = mrq;
+		}
+	}
+	host->ops->request(host, mrq);
+}
+
+EXPORT_SYMBOL(mmc_start_request);
+
+static void mmc_wait_done(struct mmc_request *mrq)
+{
+	complete(mrq->done_data);
+}
+
+int mmc_wait_for_req(struct mmc_host *host, struct mmc_request *mrq)
+{
+	DECLARE_COMPLETION(complete);
+
+	mrq->done_data = &complete;
+	mrq->done = mmc_wait_done;
+
+	mmc_start_request(host, mrq);
+
+	wait_for_completion(&complete);
+
+	return 0;
+}
+
+EXPORT_SYMBOL(mmc_wait_for_req);
+
+/**
+ *	mmc_wait_for_cmd - start a command and wait for completion
+ *	@host: MMC host to start command
+ *	@cmd: MMC command to start
+ *	@retries: maximum number of retries
+ *
+ *	Start a new MMC command for a host, and wait for the command
+ *	to complete.  Return any error that occurred while the command
+ *	was executing.  Do not attempt to parse the response.
+ */
+int mmc_wait_for_cmd(struct mmc_host *host, struct mmc_command *cmd, int retries)
+{
+	struct mmc_request mrq;
+
+	BUG_ON(host->card_busy == NULL);
+
+	memset(&mrq, 0, sizeof(struct mmc_request));
+
+	memset(cmd->resp, 0, sizeof(cmd->resp));
+	cmd->retries = retries;
+
+	mrq.cmd = cmd;
+	cmd->data = NULL;
+
+	mmc_wait_for_req(host, &mrq);
+
+	return cmd->error;
+}
+
+EXPORT_SYMBOL(mmc_wait_for_cmd);
+
+
+
+/**
+ *	__mmc_claim_host - exclusively claim a host
+ *	@host: mmc host to claim
+ *	@card: mmc card to claim host for
+ *
+ *	Claim a host for a set of operations.  If a valid card
+ *	is passed and this wasn't the last card selected, select
+ *	the card before returning.
+ *
+ *	Note: you should use mmc_card_claim_host or mmc_claim_host.
+ */
+int __mmc_claim_host(struct mmc_host *host, struct mmc_card *card)
+{
+	DECLARE_WAITQUEUE(wait, current);
+	unsigned long flags;
+	int err = 0;
+
+	add_wait_queue(&host->wq, &wait);
+	spin_lock_irqsave(&host->lock, flags);
+	while (1) {
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		if (host->card_busy == NULL)
+			break;
+		spin_unlock_irqrestore(&host->lock, flags);
+		schedule();
+		spin_lock_irqsave(&host->lock, flags);
+	}
+	set_current_state(TASK_RUNNING);
+	host->card_busy = card;
+	spin_unlock_irqrestore(&host->lock, flags);
+	remove_wait_queue(&host->wq, &wait);
+
+	if (card != (void *)-1 && host->card_selected != card) {
+		struct mmc_command cmd;
+
+		host->card_selected = card;
+
+		cmd.opcode = MMC_SELECT_CARD;
+		cmd.arg = card->rca << 16;
+		cmd.flags = MMC_RSP_R1;
+
+		err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES);
+	}
+
+	return err;
+}
+
+EXPORT_SYMBOL(__mmc_claim_host);
+
+/**
+ *	mmc_release_host - release a host
+ *	@host: mmc host to release
+ *
+ *	Release a MMC host, allowing others to claim the host
+ *	for their operations.
+ */
+void mmc_release_host(struct mmc_host *host)
+{
+	unsigned long flags;
+
+	BUG_ON(host->card_busy == NULL);
+
+	spin_lock_irqsave(&host->lock, flags);
+	host->card_busy = NULL;
+	spin_unlock_irqrestore(&host->lock, flags);
+
+	wake_up(&host->wq);
+}
+
+EXPORT_SYMBOL(mmc_release_host);
+
+/*
+ * Ensure that no card is selected.
+ */
+static void mmc_deselect_cards(struct mmc_host *host)
+{
+	struct mmc_command cmd;
+
+	if (host->card_selected) {
+		host->card_selected = NULL;
+
+		cmd.opcode = MMC_SELECT_CARD;
+		cmd.arg = 0;
+		cmd.flags = MMC_RSP_NONE;
+
+		mmc_wait_for_cmd(host, &cmd, 0);
+	}
+}
+
+
+static inline void mmc_delay(unsigned int ms)
+{
+	if (ms < HZ / 1000) {
+		yield();
+		mdelay(ms);
+	} else {
+		msleep_interruptible (ms);
+	}
+}
+
+/*
+ * Mask off any voltages we don't support and select
+ * the lowest voltage
+ */
+static u32 mmc_select_voltage(struct mmc_host *host, u32 ocr)
+{
+	int bit;
+
+	ocr &= host->ocr_avail;
+
+	bit = ffs(ocr);
+	if (bit) {
+		bit -= 1;
+
+		ocr = 3 << bit;
+
+		host->ios.vdd = bit;
+		host->ops->set_ios(host, &host->ios);
+	} else {
+		ocr = 0;
+	}
+
+	return ocr;
+}
+
+#define UNSTUFF_BITS(resp,start,size)					\
+	({								\
+		const int __size = size;				\
+		const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1;	\
+		const int __off = 3 - ((start) / 32);			\
+		const int __shft = (start) & 31;			\
+		u32 __res;						\
+									\
+		__res = resp[__off] >> __shft;				\
+		if (__size + __shft > 32)				\
+			__res |= resp[__off-1] << ((32 - __shft) % 32);	\
+		__res & __mask;						\
+	})
+
+/*
+ * Given the decoded CSD structure, decode the raw CID to our CID structure.
+ */
+static void mmc_decode_cid(struct mmc_card *card)
+{
+	u32 *resp = card->raw_cid;
+
+	memset(&card->cid, 0, sizeof(struct mmc_cid));
+
+	/*
+	 * The selection of the format here is guesswork based upon
+	 * information people have sent to date.
+	 */
+	switch (card->csd.mmca_vsn) {
+	case 0: /* MMC v1.? */
+	case 1: /* MMC v1.4 */
+		card->cid.manfid	= UNSTUFF_BITS(resp, 104, 24);
+		card->cid.prod_name[0]	= UNSTUFF_BITS(resp, 96, 8);
+		card->cid.prod_name[1]	= UNSTUFF_BITS(resp, 88, 8);
+		card->cid.prod_name[2]	= UNSTUFF_BITS(resp, 80, 8);
+		card->cid.prod_name[3]	= UNSTUFF_BITS(resp, 72, 8);
+		card->cid.prod_name[4]	= UNSTUFF_BITS(resp, 64, 8);
+		card->cid.prod_name[5]	= UNSTUFF_BITS(resp, 56, 8);
+		card->cid.prod_name[6]	= UNSTUFF_BITS(resp, 48, 8);
+		card->cid.hwrev		= UNSTUFF_BITS(resp, 44, 4);
+		card->cid.fwrev		= UNSTUFF_BITS(resp, 40, 4);
+		card->cid.serial	= UNSTUFF_BITS(resp, 16, 24);
+		card->cid.month		= UNSTUFF_BITS(resp, 12, 4);
+		card->cid.year		= UNSTUFF_BITS(resp, 8, 4) + 1997;
+		break;
+
+	case 2: /* MMC v2.x ? */
+	case 3: /* MMC v3.x ? */
+		card->cid.manfid	= UNSTUFF_BITS(resp, 120, 8);
+		card->cid.oemid		= UNSTUFF_BITS(resp, 104, 16);
+		card->cid.prod_name[0]	= UNSTUFF_BITS(resp, 96, 8);
+		card->cid.prod_name[1]	= UNSTUFF_BITS(resp, 88, 8);
+		card->cid.prod_name[2]	= UNSTUFF_BITS(resp, 80, 8);
+		card->cid.prod_name[3]	= UNSTUFF_BITS(resp, 72, 8);
+		card->cid.prod_name[4]	= UNSTUFF_BITS(resp, 64, 8);
+		card->cid.prod_name[5]	= UNSTUFF_BITS(resp, 56, 8);
+		card->cid.serial	= UNSTUFF_BITS(resp, 16, 32);
+		card->cid.month		= UNSTUFF_BITS(resp, 12, 4);
+		card->cid.year		= UNSTUFF_BITS(resp, 8, 4) + 1997;
+		break;
+
+	default:
+		printk("%s: card has unknown MMCA version %d\n",
+			card->host->host_name, card->csd.mmca_vsn);
+		mmc_card_set_bad(card);
+		break;
+	}
+}
+
+/*
+ * Given a 128-bit response, decode to our card CSD structure.
+ */
+static void mmc_decode_csd(struct mmc_card *card)
+{
+	struct mmc_csd *csd = &card->csd;
+	unsigned int e, m, csd_struct;
+	u32 *resp = card->raw_csd;
+
+	/*
+	 * We only understand CSD structure v1.1 and v2.
+	 * v2 has extra information in bits 15, 11 and 10.
+	 */
+	csd_struct = UNSTUFF_BITS(resp, 126, 2);
+	if (csd_struct != 1 && csd_struct != 2) {
+		printk("%s: unrecognised CSD structure version %d\n",
+			card->host->host_name, csd_struct);
+		mmc_card_set_bad(card);
+		return;
+	}
+
+	csd->mmca_vsn	 = UNSTUFF_BITS(resp, 122, 4);
+	m = UNSTUFF_BITS(resp, 115, 4);
+	e = UNSTUFF_BITS(resp, 112, 3);
+	csd->tacc_ns	 = (tacc_exp[e] * tacc_mant[m] + 9) / 10;
+	csd->tacc_clks	 = UNSTUFF_BITS(resp, 104, 8) * 100;
+
+	m = UNSTUFF_BITS(resp, 99, 4);
+	e = UNSTUFF_BITS(resp, 96, 3);
+	csd->max_dtr	  = tran_exp[e] * tran_mant[m];
+	csd->cmdclass	  = UNSTUFF_BITS(resp, 84, 12);
+
+	e = UNSTUFF_BITS(resp, 47, 3);
+	m = UNSTUFF_BITS(resp, 62, 12);
+	csd->capacity	  = (1 + m) << (e + 2);
+
+	csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
+}
+
+/*
+ * Locate a MMC card on this MMC host given a raw CID.
+ */
+static struct mmc_card *mmc_find_card(struct mmc_host *host, u32 *raw_cid)
+{
+	struct mmc_card *card;
+
+	list_for_each_entry(card, &host->cards, node) {
+		if (memcmp(card->raw_cid, raw_cid, sizeof(card->raw_cid)) == 0)
+			return card;
+	}
+	return NULL;
+}
+
+/*
+ * Allocate a new MMC card, and assign a unique RCA.
+ */
+static struct mmc_card *
+mmc_alloc_card(struct mmc_host *host, u32 *raw_cid, unsigned int *frca)
+{
+	struct mmc_card *card, *c;
+	unsigned int rca = *frca;
+
+	card = kmalloc(sizeof(struct mmc_card), GFP_KERNEL);
+	if (!card)
+		return ERR_PTR(-ENOMEM);
+
+	mmc_init_card(card, host);
+	memcpy(card->raw_cid, raw_cid, sizeof(card->raw_cid));
+
+ again:
+	list_for_each_entry(c, &host->cards, node)
+		if (c->rca == rca) {
+			rca++;
+			goto again;
+		}
+
+	card->rca = rca;
+
+	*frca = rca;
+
+	return card;
+}
+
+/*
+ * Tell attached cards to go to IDLE state
+ */
+static void mmc_idle_cards(struct mmc_host *host)
+{
+	struct mmc_command cmd;
+
+	cmd.opcode = MMC_GO_IDLE_STATE;
+	cmd.arg = 0;
+	cmd.flags = MMC_RSP_NONE;
+
+	mmc_wait_for_cmd(host, &cmd, 0);
+
+	mmc_delay(1);
+}
+
+/*
+ * Apply power to the MMC stack.
+ */
+static void mmc_power_up(struct mmc_host *host)
+{
+	int bit = fls(host->ocr_avail) - 1;
+
+	host->ios.vdd = bit;
+	host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN;
+	host->ios.power_mode = MMC_POWER_UP;
+	host->ops->set_ios(host, &host->ios);
+
+	mmc_delay(1);
+
+	host->ios.clock = host->f_min;
+	host->ios.power_mode = MMC_POWER_ON;
+	host->ops->set_ios(host, &host->ios);
+
+	mmc_delay(2);
+}
+
+static void mmc_power_off(struct mmc_host *host)
+{
+	host->ios.clock = 0;
+	host->ios.vdd = 0;
+	host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN;
+	host->ios.power_mode = MMC_POWER_OFF;
+	host->ops->set_ios(host, &host->ios);
+}
+
+static int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
+{
+	struct mmc_command cmd;
+	int i, err = 0;
+
+	cmd.opcode = MMC_SEND_OP_COND;
+	cmd.arg = ocr;
+	cmd.flags = MMC_RSP_R3;
+
+	for (i = 100; i; i--) {
+		err = mmc_wait_for_cmd(host, &cmd, 0);
+		if (err != MMC_ERR_NONE)
+			break;
+
+		if (cmd.resp[0] & MMC_CARD_BUSY || ocr == 0)
+			break;
+
+		err = MMC_ERR_TIMEOUT;
+
+		mmc_delay(10);
+	}
+
+	if (rocr)
+		*rocr = cmd.resp[0];
+
+	return err;
+}
+
+/*
+ * Discover cards by requesting their CID.  If this command
+ * times out, it is not an error; there are no further cards
+ * to be discovered.  Add new cards to the list.
+ *
+ * Create a mmc_card entry for each discovered card, assigning
+ * it an RCA, and save the raw CID for decoding later.
+ */
+static void mmc_discover_cards(struct mmc_host *host)
+{
+	struct mmc_card *card;
+	unsigned int first_rca = 1, err;
+
+	while (1) {
+		struct mmc_command cmd;
+
+		cmd.opcode = MMC_ALL_SEND_CID;
+		cmd.arg = 0;
+		cmd.flags = MMC_RSP_R2;
+
+		err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES);
+		if (err == MMC_ERR_TIMEOUT) {
+			err = MMC_ERR_NONE;
+			break;
+		}
+		if (err != MMC_ERR_NONE) {
+			printk(KERN_ERR "%s: error requesting CID: %d\n",
+				host->host_name, err);
+			break;
+		}
+
+		card = mmc_find_card(host, cmd.resp);
+		if (!card) {
+			card = mmc_alloc_card(host, cmd.resp, &first_rca);
+			if (IS_ERR(card)) {
+				err = PTR_ERR(card);
+				break;
+			}
+			list_add(&card->node, &host->cards);
+		}
+
+		card->state &= ~MMC_STATE_DEAD;
+
+		cmd.opcode = MMC_SET_RELATIVE_ADDR;
+		cmd.arg = card->rca << 16;
+		cmd.flags = MMC_RSP_R1;
+
+		err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES);
+		if (err != MMC_ERR_NONE)
+			mmc_card_set_dead(card);
+	}
+}
+
+static void mmc_read_csds(struct mmc_host *host)
+{
+	struct mmc_card *card;
+
+	list_for_each_entry(card, &host->cards, node) {
+		struct mmc_command cmd;
+		int err;
+
+		if (card->state & (MMC_STATE_DEAD|MMC_STATE_PRESENT))
+			continue;
+
+		cmd.opcode = MMC_SEND_CSD;
+		cmd.arg = card->rca << 16;
+		cmd.flags = MMC_RSP_R2;
+
+		err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES);
+		if (err != MMC_ERR_NONE) {
+			mmc_card_set_dead(card);
+			continue;
+		}
+
+		memcpy(card->raw_csd, cmd.resp, sizeof(card->raw_csd));
+
+		mmc_decode_csd(card);
+		mmc_decode_cid(card);
+	}
+}
+
+static unsigned int mmc_calculate_clock(struct mmc_host *host)
+{
+	struct mmc_card *card;
+	unsigned int max_dtr = host->f_max;
+
+	list_for_each_entry(card, &host->cards, node)
+		if (!mmc_card_dead(card) && max_dtr > card->csd.max_dtr)
+			max_dtr = card->csd.max_dtr;
+
+	DBG("MMC: selected %d.%03dMHz transfer rate\n",
+	    max_dtr / 1000000, (max_dtr / 1000) % 1000);
+
+	return max_dtr;
+}
+
+/*
+ * Check whether cards we already know about are still present.
+ * We do this by requesting status, and checking whether a card
+ * responds.
+ *
+ * A request for status does not cause a state change in data
+ * transfer mode.
+ */
+static void mmc_check_cards(struct mmc_host *host)
+{
+	struct list_head *l, *n;
+
+	mmc_deselect_cards(host);
+
+	list_for_each_safe(l, n, &host->cards) {
+		struct mmc_card *card = mmc_list_to_card(l);
+		struct mmc_command cmd;
+		int err;
+
+		cmd.opcode = MMC_SEND_STATUS;
+		cmd.arg = card->rca << 16;
+		cmd.flags = MMC_RSP_R1;
+
+		err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES);
+		if (err == MMC_ERR_NONE)
+			continue;
+
+		mmc_card_set_dead(card);
+	}
+}
+
+static void mmc_setup(struct mmc_host *host)
+{
+	if (host->ios.power_mode != MMC_POWER_ON) {
+		int err;
+		u32 ocr;
+
+		mmc_power_up(host);
+		mmc_idle_cards(host);
+
+		err = mmc_send_op_cond(host, 0, &ocr);
+		if (err != MMC_ERR_NONE)
+			return;
+
+		host->ocr = mmc_select_voltage(host, ocr);
+
+		/*
+		 * Since we're changing the OCR value, we seem to
+		 * need to tell some cards to go back to the idle
+		 * state.  We wait 1ms to give cards time to
+		 * respond.
+		 */
+		if (host->ocr)
+			mmc_idle_cards(host);
+	} else {
+		host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN;
+		host->ios.clock = host->f_min;
+		host->ops->set_ios(host, &host->ios);
+
+		/*
+		 * We should remember the OCR mask from the existing
+		 * cards, and detect the new cards OCR mask, combine
+		 * the two and re-select the VDD.  However, if we do
+		 * change VDD, we should do an idle, and then do a
+		 * full re-initialisation.  We would need to notify
+		 * drivers so that they can re-setup the cards as
+		 * well, while keeping their queues at bay.
+		 *
+		 * For the moment, we take the easy way out - if the
+		 * new cards don't like our currently selected VDD,
+		 * they drop off the bus.
+		 */
+	}
+
+	if (host->ocr == 0)
+		return;
+
+	/*
+	 * Send the selected OCR multiple times... until the cards
+	 * all get the idea that they should be ready for CMD2.
+	 * (My SanDisk card seems to need this.)
+	 */
+	mmc_send_op_cond(host, host->ocr, NULL);
+
+	mmc_discover_cards(host);
+
+	/*
+	 * Ok, now switch to push-pull mode.
+	 */
+	host->ios.bus_mode = MMC_BUSMODE_PUSHPULL;
+	host->ops->set_ios(host, &host->ios);
+
+	mmc_read_csds(host);
+}
+
+
+/**
+ *	mmc_detect_change - process change of state on a MMC socket
+ *	@host: host which changed state.
+ *
+ *	All we know is that card(s) have been inserted or removed
+ *	from the socket(s).  We don't know which socket or cards.
+ */
+void mmc_detect_change(struct mmc_host *host)
+{
+	schedule_work(&host->detect);
+}
+
+EXPORT_SYMBOL(mmc_detect_change);
+
+
+static void mmc_rescan(void *data)
+{
+	struct mmc_host *host = data;
+	struct list_head *l, *n;
+
+	mmc_claim_host(host);
+
+	if (host->ios.power_mode == MMC_POWER_ON)
+		mmc_check_cards(host);
+
+	mmc_setup(host);
+
+	if (!list_empty(&host->cards)) {
+		/*
+		 * (Re-)calculate the fastest clock rate which the
+		 * attached cards and the host support.
+		 */
+		host->ios.clock = mmc_calculate_clock(host);
+		host->ops->set_ios(host, &host->ios);
+	}
+
+	mmc_release_host(host);
+
+	list_for_each_safe(l, n, &host->cards) {
+		struct mmc_card *card = mmc_list_to_card(l);
+
+		/*
+		 * If this is a new and good card, register it.
+		 */
+		if (!mmc_card_present(card) && !mmc_card_dead(card)) {
+			if (mmc_register_card(card))
+				mmc_card_set_dead(card);
+			else
+				mmc_card_set_present(card);
+		}
+
+		/*
+		 * If this card is dead, destroy it.
+		 */
+		if (mmc_card_dead(card)) {
+			list_del(&card->node);
+			mmc_remove_card(card);
+		}
+	}
+
+	/*
+	 * If we discover that there are no cards on the
+	 * bus, turn off the clock and power down.
+	 */
+	if (list_empty(&host->cards))
+		mmc_power_off(host);
+}
+
+
+/**
+ *	mmc_alloc_host - initialise the per-host structure.
+ *	@extra: sizeof private data structure
+ *	@dev: pointer to host device model structure
+ *
+ *	Initialise the per-host structure.
+ */
+struct mmc_host *mmc_alloc_host(int extra, struct device *dev)
+{
+	struct mmc_host *host;
+
+	host = kmalloc(sizeof(struct mmc_host) + extra, GFP_KERNEL);
+	if (host) {
+		memset(host, 0, sizeof(struct mmc_host) + extra);
+
+		spin_lock_init(&host->lock);
+		init_waitqueue_head(&host->wq);
+		INIT_LIST_HEAD(&host->cards);
+		INIT_WORK(&host->detect, mmc_rescan, host);
+
+		host->dev = dev;
+
+		/*
+		 * By default, hosts do not support SGIO or large requests.
+		 * They have to set these according to their abilities.
+		 */
+		host->max_hw_segs = 1;
+		host->max_phys_segs = 1;
+		host->max_sectors = 1 << (PAGE_CACHE_SHIFT - 9);
+		host->max_seg_size = PAGE_CACHE_SIZE;
+	}
+
+	return host;
+}
+
+EXPORT_SYMBOL(mmc_alloc_host);
+
+/**
+ *	mmc_add_host - initialise host hardware
+ *	@host: mmc host
+ */
+int mmc_add_host(struct mmc_host *host)
+{
+	static unsigned int host_num;
+
+	snprintf(host->host_name, sizeof(host->host_name),
+		 "mmc%d", host_num++);
+
+	mmc_power_off(host);
+	mmc_detect_change(host);
+
+	return 0;
+}
+
+EXPORT_SYMBOL(mmc_add_host);
+
+/**
+ *	mmc_remove_host - remove host hardware
+ *	@host: mmc host
+ *
+ *	Unregister and remove all cards associated with this host,
+ *	and power down the MMC bus.
+ */
+void mmc_remove_host(struct mmc_host *host)
+{
+	struct list_head *l, *n;
+
+	list_for_each_safe(l, n, &host->cards) {
+		struct mmc_card *card = mmc_list_to_card(l);
+
+		mmc_remove_card(card);
+	}
+
+	mmc_power_off(host);
+}
+
+EXPORT_SYMBOL(mmc_remove_host);
+
+/**
+ *	mmc_free_host - free the host structure
+ *	@host: mmc host
+ *
+ *	Free the host once all references to it have been dropped.
+ */
+void mmc_free_host(struct mmc_host *host)
+{
+	flush_scheduled_work();
+	kfree(host);
+}
+
+EXPORT_SYMBOL(mmc_free_host);
+
+#ifdef CONFIG_PM
+
+/**
+ *	mmc_suspend_host - suspend a host
+ *	@host: mmc host
+ *	@state: suspend mode (PM_SUSPEND_xxx)
+ */
+int mmc_suspend_host(struct mmc_host *host, u32 state)
+{
+	mmc_claim_host(host);
+	mmc_deselect_cards(host);
+	mmc_power_off(host);
+	mmc_release_host(host);
+
+	return 0;
+}
+
+EXPORT_SYMBOL(mmc_suspend_host);
+
+/**
+ *	mmc_resume_host - resume a previously suspended host
+ *	@host: mmc host
+ */
+int mmc_resume_host(struct mmc_host *host)
+{
+	mmc_detect_change(host);
+
+	return 0;
+}
+
+EXPORT_SYMBOL(mmc_resume_host);
+
+#endif
+
+MODULE_LICENSE("GPL");
diff --git a/drivers/mmc/mmc.h b/drivers/mmc/mmc.h
new file mode 100644
index 00000000000..b498dffe0b1
--- /dev/null
+++ b/drivers/mmc/mmc.h
@@ -0,0 +1,16 @@
+/*
+ *  linux/drivers/mmc/mmc.h
+ *
+ *  Copyright (C) 2003 Russell King, All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef _MMC_H
+#define _MMC_H
+/* core-internal functions */
+void mmc_init_card(struct mmc_card *card, struct mmc_host *host);
+int mmc_register_card(struct mmc_card *card);
+void mmc_remove_card(struct mmc_card *card);
+#endif
diff --git a/drivers/mmc/mmc_block.c b/drivers/mmc/mmc_block.c
new file mode 100644
index 00000000000..b5b4a7b1190
--- /dev/null
+++ b/drivers/mmc/mmc_block.c
@@ -0,0 +1,509 @@
+/*
+ * Block driver for media (i.e., flash cards)
+ *
+ * Copyright 2002 Hewlett-Packard Company
+ *
+ * Use consistent with the GNU GPL is permitted,
+ * provided that this copyright notice is
+ * preserved in its entirety in all copies and derived works.
+ *
+ * HEWLETT-PACKARD COMPANY MAKES NO WARRANTIES, EXPRESSED OR IMPLIED,
+ * AS TO THE USEFULNESS OR CORRECTNESS OF THIS CODE OR ITS
+ * FITNESS FOR ANY PARTICULAR PURPOSE.
+ *
+ * Many thanks to Alessandro Rubini and Jonathan Corbet!
+ *
+ * Author:  Andrew Christian
+ *          28 May 2002
+ */
+#include <linux/moduleparam.h>
+#include <linux/module.h>
+#include <linux/init.h>
+
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/errno.h>
+#include <linux/hdreg.h>
+#include <linux/kdev_t.h>
+#include <linux/blkdev.h>
+#include <linux/devfs_fs_kernel.h>
+
+#include <linux/mmc/card.h>
+#include <linux/mmc/protocol.h>
+
+#include <asm/system.h>
+#include <asm/uaccess.h>
+
+#include "mmc_queue.h"
+
+/*
+ * max 8 partitions per card
+ */
+#define MMC_SHIFT	3
+
+static int major;
+
+/*
+ * There is one mmc_blk_data per slot.
+ */
+struct mmc_blk_data {
+	spinlock_t	lock;
+	struct gendisk	*disk;
+	struct mmc_queue queue;
+
+	unsigned int	usage;
+	unsigned int	block_bits;
+};
+
+static DECLARE_MUTEX(open_lock);
+
+static struct mmc_blk_data *mmc_blk_get(struct gendisk *disk)
+{
+	struct mmc_blk_data *md;
+
+	down(&open_lock);
+	md = disk->private_data;
+	if (md && md->usage == 0)
+		md = NULL;
+	if (md)
+		md->usage++;
+	up(&open_lock);
+
+	return md;
+}
+
+static void mmc_blk_put(struct mmc_blk_data *md)
+{
+	down(&open_lock);
+	md->usage--;
+	if (md->usage == 0) {
+		put_disk(md->disk);
+		mmc_cleanup_queue(&md->queue);
+		kfree(md);
+	}
+	up(&open_lock);
+}
+
+static int mmc_blk_open(struct inode *inode, struct file *filp)
+{
+	struct mmc_blk_data *md;
+	int ret = -ENXIO;
+
+	md = mmc_blk_get(inode->i_bdev->bd_disk);
+	if (md) {
+		if (md->usage == 2)
+			check_disk_change(inode->i_bdev);
+		ret = 0;
+	}
+
+	return ret;
+}
+
+static int mmc_blk_release(struct inode *inode, struct file *filp)
+{
+	struct mmc_blk_data *md = inode->i_bdev->bd_disk->private_data;
+
+	mmc_blk_put(md);
+	return 0;
+}
+
+static int
+mmc_blk_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg)
+{
+	struct block_device *bdev = inode->i_bdev;
+
+	if (cmd == HDIO_GETGEO) {
+		struct hd_geometry geo;
+
+		memset(&geo, 0, sizeof(struct hd_geometry));
+
+		geo.cylinders	= get_capacity(bdev->bd_disk) / (4 * 16);
+		geo.heads	= 4;
+		geo.sectors	= 16;
+		geo.start	= get_start_sect(bdev);
+
+		return copy_to_user((void __user *)arg, &geo, sizeof(geo))
+			? -EFAULT : 0;
+	}
+
+	return -ENOTTY;
+}
+
+static struct block_device_operations mmc_bdops = {
+	.open			= mmc_blk_open,
+	.release		= mmc_blk_release,
+	.ioctl			= mmc_blk_ioctl,
+	.owner			= THIS_MODULE,
+};
+
+struct mmc_blk_request {
+	struct mmc_request	mrq;
+	struct mmc_command	cmd;
+	struct mmc_command	stop;
+	struct mmc_data		data;
+};
+
+static int mmc_blk_prep_rq(struct mmc_queue *mq, struct request *req)
+{
+	struct mmc_blk_data *md = mq->data;
+	int stat = BLKPREP_OK;
+
+	/*
+	 * If we have no device, we haven't finished initialising.
+	 */
+	if (!md || !mq->card) {
+		printk(KERN_ERR "%s: killing request - no device/host\n",
+		       req->rq_disk->disk_name);
+		stat = BLKPREP_KILL;
+	}
+
+	return stat;
+}
+
+static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
+{
+	struct mmc_blk_data *md = mq->data;
+	struct mmc_card *card = md->queue.card;
+	int ret;
+
+	if (mmc_card_claim_host(card))
+		goto cmd_err;
+
+	do {
+		struct mmc_blk_request brq;
+		struct mmc_command cmd;
+
+		memset(&brq, 0, sizeof(struct mmc_blk_request));
+		brq.mrq.cmd = &brq.cmd;
+		brq.mrq.data = &brq.data;
+
+		brq.cmd.arg = req->sector << 9;
+		brq.cmd.flags = MMC_RSP_R1;
+		brq.data.timeout_ns = card->csd.tacc_ns * 10;
+		brq.data.timeout_clks = card->csd.tacc_clks * 10;
+		brq.data.blksz_bits = md->block_bits;
+		brq.data.blocks = req->nr_sectors >> (md->block_bits - 9);
+		brq.stop.opcode = MMC_STOP_TRANSMISSION;
+		brq.stop.arg = 0;
+		brq.stop.flags = MMC_RSP_R1B;
+
+		if (rq_data_dir(req) == READ) {
+			brq.cmd.opcode = brq.data.blocks > 1 ? MMC_READ_MULTIPLE_BLOCK : MMC_READ_SINGLE_BLOCK;
+			brq.data.flags |= MMC_DATA_READ;
+		} else {
+			brq.cmd.opcode = MMC_WRITE_BLOCK;
+			brq.cmd.flags = MMC_RSP_R1B;
+			brq.data.flags |= MMC_DATA_WRITE;
+			brq.data.blocks = 1;
+		}
+		brq.mrq.stop = brq.data.blocks > 1 ? &brq.stop : NULL;
+
+		brq.data.sg = mq->sg;
+		brq.data.sg_len = blk_rq_map_sg(req->q, req, brq.data.sg);
+
+		mmc_wait_for_req(card->host, &brq.mrq);
+		if (brq.cmd.error) {
+			printk(KERN_ERR "%s: error %d sending read/write command\n",
+			       req->rq_disk->disk_name, brq.cmd.error);
+			goto cmd_err;
+		}
+
+		if (brq.data.error) {
+			printk(KERN_ERR "%s: error %d transferring data\n",
+			       req->rq_disk->disk_name, brq.data.error);
+			goto cmd_err;
+		}
+
+		if (brq.stop.error) {
+			printk(KERN_ERR "%s: error %d sending stop command\n",
+			       req->rq_disk->disk_name, brq.stop.error);
+			goto cmd_err;
+		}
+
+		do {
+			int err;
+
+			cmd.opcode = MMC_SEND_STATUS;
+			cmd.arg = card->rca << 16;
+			cmd.flags = MMC_RSP_R1;
+			err = mmc_wait_for_cmd(card->host, &cmd, 5);
+			if (err) {
+				printk(KERN_ERR "%s: error %d requesting status\n",
+				       req->rq_disk->disk_name, err);
+				goto cmd_err;
+			}
+		} while (!(cmd.resp[0] & R1_READY_FOR_DATA));
+
+#if 0
+		if (cmd.resp[0] & ~0x00000900)
+			printk(KERN_ERR "%s: status = %08x\n",
+			       req->rq_disk->disk_name, cmd.resp[0]);
+		if (mmc_decode_status(cmd.resp))
+			goto cmd_err;
+#endif
+
+		/*
+		 * A block was successfully transferred.
+		 */
+		spin_lock_irq(&md->lock);
+		ret = end_that_request_chunk(req, 1, brq.data.bytes_xfered);
+		if (!ret) {
+			/*
+			 * The whole request completed successfully.
+			 */
+			add_disk_randomness(req->rq_disk);
+			blkdev_dequeue_request(req);
+			end_that_request_last(req);
+		}
+		spin_unlock_irq(&md->lock);
+	} while (ret);
+
+	mmc_card_release_host(card);
+
+	return 1;
+
+ cmd_err:
+	mmc_card_release_host(card);
+
+	/*
+	 * This is a little draconian, but until we get proper
+	 * error handling sorted out here, its the best we can
+	 * do - especially as some hosts have no idea how much
+	 * data was transferred before the error occurred.
+	 */
+	spin_lock_irq(&md->lock);
+	do {
+		ret = end_that_request_chunk(req, 0,
+				req->current_nr_sectors << 9);
+	} while (ret);
+
+	add_disk_randomness(req->rq_disk);
+	blkdev_dequeue_request(req);
+	end_that_request_last(req);
+	spin_unlock_irq(&md->lock);
+
+	return 0;
+}
+
+#define MMC_NUM_MINORS	(256 >> MMC_SHIFT)
+
+static unsigned long dev_use[MMC_NUM_MINORS/(8*sizeof(unsigned long))];
+
+static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card)
+{
+	struct mmc_blk_data *md;
+	int devidx, ret;
+
+	devidx = find_first_zero_bit(dev_use, MMC_NUM_MINORS);
+	if (devidx >= MMC_NUM_MINORS)
+		return ERR_PTR(-ENOSPC);
+	__set_bit(devidx, dev_use);
+
+	md = kmalloc(sizeof(struct mmc_blk_data), GFP_KERNEL);
+	if (md) {
+		memset(md, 0, sizeof(struct mmc_blk_data));
+
+		md->disk = alloc_disk(1 << MMC_SHIFT);
+		if (md->disk == NULL) {
+			kfree(md);
+			md = ERR_PTR(-ENOMEM);
+			goto out;
+		}
+
+		spin_lock_init(&md->lock);
+		md->usage = 1;
+
+		ret = mmc_init_queue(&md->queue, card, &md->lock);
+		if (ret) {
+			put_disk(md->disk);
+			kfree(md);
+			md = ERR_PTR(ret);
+			goto out;
+		}
+		md->queue.prep_fn = mmc_blk_prep_rq;
+		md->queue.issue_fn = mmc_blk_issue_rq;
+		md->queue.data = md;
+
+		md->disk->major	= major;
+		md->disk->first_minor = devidx << MMC_SHIFT;
+		md->disk->fops = &mmc_bdops;
+		md->disk->private_data = md;
+		md->disk->queue = md->queue.queue;
+		md->disk->driverfs_dev = &card->dev;
+
+		/*
+		 * As discussed on lkml, GENHD_FL_REMOVABLE should:
+		 *
+		 * - be set for removable media with permanent block devices
+		 * - be unset for removable block devices with permanent media
+		 *
+		 * Since MMC block devices clearly fall under the second
+		 * case, we do not set GENHD_FL_REMOVABLE.  Userspace
+		 * should use the block device creation/destruction hotplug
+		 * messages to tell when the card is present.
+		 */
+
+		sprintf(md->disk->disk_name, "mmcblk%d", devidx);
+		sprintf(md->disk->devfs_name, "mmc/blk%d", devidx);
+
+		md->block_bits = card->csd.read_blkbits;
+
+		blk_queue_hardsect_size(md->queue.queue, 1 << md->block_bits);
+		set_capacity(md->disk, card->csd.capacity);
+	}
+ out:
+	return md;
+}
+
+static int
+mmc_blk_set_blksize(struct mmc_blk_data *md, struct mmc_card *card)
+{
+	struct mmc_command cmd;
+	int err;
+
+	mmc_card_claim_host(card);
+	cmd.opcode = MMC_SET_BLOCKLEN;
+	cmd.arg = 1 << card->csd.read_blkbits;
+	cmd.flags = MMC_RSP_R1;
+	err = mmc_wait_for_cmd(card->host, &cmd, 5);
+	mmc_card_release_host(card);
+
+	if (err) {
+		printk(KERN_ERR "%s: unable to set block size to %d: %d\n",
+			md->disk->disk_name, cmd.arg, err);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int mmc_blk_probe(struct mmc_card *card)
+{
+	struct mmc_blk_data *md;
+	int err;
+
+	if (card->csd.cmdclass & ~0x1ff)
+		return -ENODEV;
+
+	if (card->csd.read_blkbits < 9) {
+		printk(KERN_WARNING "%s: read blocksize too small (%u)\n",
+			mmc_card_id(card), 1 << card->csd.read_blkbits);
+		return -ENODEV;
+	}
+
+	md = mmc_blk_alloc(card);
+	if (IS_ERR(md))
+		return PTR_ERR(md);
+
+	err = mmc_blk_set_blksize(md, card);
+	if (err)
+		goto out;
+
+	printk(KERN_INFO "%s: %s %s %dKiB\n",
+		md->disk->disk_name, mmc_card_id(card), mmc_card_name(card),
+		(card->csd.capacity << card->csd.read_blkbits) / 1024);
+
+	mmc_set_drvdata(card, md);
+	add_disk(md->disk);
+	return 0;
+
+ out:
+	mmc_blk_put(md);
+
+	return err;
+}
+
+static void mmc_blk_remove(struct mmc_card *card)
+{
+	struct mmc_blk_data *md = mmc_get_drvdata(card);
+
+	if (md) {
+		int devidx;
+
+		del_gendisk(md->disk);
+
+		/*
+		 * I think this is needed.
+		 */
+		md->disk->queue = NULL;
+
+		devidx = md->disk->first_minor >> MMC_SHIFT;
+		__clear_bit(devidx, dev_use);
+
+		mmc_blk_put(md);
+	}
+	mmc_set_drvdata(card, NULL);
+}
+
+#ifdef CONFIG_PM
+static int mmc_blk_suspend(struct mmc_card *card, pm_message_t state)
+{
+	struct mmc_blk_data *md = mmc_get_drvdata(card);
+
+	if (md) {
+		mmc_queue_suspend(&md->queue);
+	}
+	return 0;
+}
+
+static int mmc_blk_resume(struct mmc_card *card)
+{
+	struct mmc_blk_data *md = mmc_get_drvdata(card);
+
+	if (md) {
+		mmc_blk_set_blksize(md, card);
+		mmc_queue_resume(&md->queue);
+	}
+	return 0;
+}
+#else
+#define	mmc_blk_suspend	NULL
+#define mmc_blk_resume	NULL
+#endif
+
+static struct mmc_driver mmc_driver = {
+	.drv		= {
+		.name	= "mmcblk",
+	},
+	.probe		= mmc_blk_probe,
+	.remove		= mmc_blk_remove,
+	.suspend	= mmc_blk_suspend,
+	.resume		= mmc_blk_resume,
+};
+
+static int __init mmc_blk_init(void)
+{
+	int res = -ENOMEM;
+
+	res = register_blkdev(major, "mmc");
+	if (res < 0) {
+		printk(KERN_WARNING "Unable to get major %d for MMC media: %d\n",
+		       major, res);
+		goto out;
+	}
+	if (major == 0)
+		major = res;
+
+	devfs_mk_dir("mmc");
+	return mmc_register_driver(&mmc_driver);
+
+ out:
+	return res;
+}
+
+static void __exit mmc_blk_exit(void)
+{
+	mmc_unregister_driver(&mmc_driver);
+	devfs_remove("mmc");
+	unregister_blkdev(major, "mmc");
+}
+
+module_init(mmc_blk_init);
+module_exit(mmc_blk_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Multimedia Card (MMC) block device driver");
+
+module_param(major, int, 0444);
+MODULE_PARM_DESC(major, "specify the major device number for MMC block driver");
diff --git a/drivers/mmc/mmc_queue.c b/drivers/mmc/mmc_queue.c
new file mode 100644
index 00000000000..0b9682e9a35
--- /dev/null
+++ b/drivers/mmc/mmc_queue.c
@@ -0,0 +1,238 @@
+/*
+ *  linux/drivers/mmc/mmc_queue.c
+ *
+ *  Copyright (C) 2003 Russell King, All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+#include <linux/module.h>
+#include <linux/blkdev.h>
+
+#include <linux/mmc/card.h>
+#include <linux/mmc/host.h>
+#include "mmc_queue.h"
+
+#define MMC_QUEUE_EXIT		(1 << 0)
+#define MMC_QUEUE_SUSPENDED	(1 << 1)
+
+/*
+ * Prepare a MMC request.  Essentially, this means passing the
+ * preparation off to the media driver.  The media driver will
+ * create a mmc_io_request in req->special.
+ */
+static int mmc_prep_request(struct request_queue *q, struct request *req)
+{
+	struct mmc_queue *mq = q->queuedata;
+	int ret = BLKPREP_KILL;
+
+	if (req->flags & REQ_SPECIAL) {
+		/*
+		 * Special commands already have the command
+		 * blocks already setup in req->special.
+		 */
+		BUG_ON(!req->special);
+
+		ret = BLKPREP_OK;
+	} else if (req->flags & (REQ_CMD | REQ_BLOCK_PC)) {
+		/*
+		 * Block I/O requests need translating according
+		 * to the protocol.
+		 */
+		ret = mq->prep_fn(mq, req);
+	} else {
+		/*
+		 * Everything else is invalid.
+		 */
+		blk_dump_rq_flags(req, "MMC bad request");
+	}
+
+	if (ret == BLKPREP_OK)
+		req->flags |= REQ_DONTPREP;
+
+	return ret;
+}
+
+static int mmc_queue_thread(void *d)
+{
+	struct mmc_queue *mq = d;
+	struct request_queue *q = mq->queue;
+	DECLARE_WAITQUEUE(wait, current);
+
+	/*
+	 * Set iothread to ensure that we aren't put to sleep by
+	 * the process freezing.  We handle suspension ourselves.
+	 */
+	current->flags |= PF_MEMALLOC|PF_NOFREEZE;
+
+	daemonize("mmcqd");
+
+	complete(&mq->thread_complete);
+
+	down(&mq->thread_sem);
+	add_wait_queue(&mq->thread_wq, &wait);
+	do {
+		struct request *req = NULL;
+
+		spin_lock_irq(q->queue_lock);
+		set_current_state(TASK_INTERRUPTIBLE);
+		if (!blk_queue_plugged(q))
+			mq->req = req = elv_next_request(q);
+		spin_unlock_irq(q->queue_lock);
+
+		if (!req) {
+			if (mq->flags & MMC_QUEUE_EXIT)
+				break;
+			up(&mq->thread_sem);
+			schedule();
+			down(&mq->thread_sem);
+			continue;
+		}
+		set_current_state(TASK_RUNNING);
+
+		mq->issue_fn(mq, req);
+	} while (1);
+	remove_wait_queue(&mq->thread_wq, &wait);
+	up(&mq->thread_sem);
+
+	complete_and_exit(&mq->thread_complete, 0);
+	return 0;
+}
+
+/*
+ * Generic MMC request handler.  This is called for any queue on a
+ * particular host.  When the host is not busy, we look for a request
+ * on any queue on this host, and attempt to issue it.  This may
+ * not be the queue we were asked to process.
+ */
+static void mmc_request(request_queue_t *q)
+{
+	struct mmc_queue *mq = q->queuedata;
+
+	if (!mq->req)
+		wake_up(&mq->thread_wq);
+}
+
+/**
+ * mmc_init_queue - initialise a queue structure.
+ * @mq: mmc queue
+ * @card: mmc card to attach this queue
+ * @lock: queue lock
+ *
+ * Initialise a MMC card request queue.
+ */
+int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card, spinlock_t *lock)
+{
+	struct mmc_host *host = card->host;
+	u64 limit = BLK_BOUNCE_HIGH;
+	int ret;
+
+	if (host->dev->dma_mask && *host->dev->dma_mask)
+		limit = *host->dev->dma_mask;
+
+	mq->card = card;
+	mq->queue = blk_init_queue(mmc_request, lock);
+	if (!mq->queue)
+		return -ENOMEM;
+
+	blk_queue_prep_rq(mq->queue, mmc_prep_request);
+	blk_queue_bounce_limit(mq->queue, limit);
+	blk_queue_max_sectors(mq->queue, host->max_sectors);
+	blk_queue_max_phys_segments(mq->queue, host->max_phys_segs);
+	blk_queue_max_hw_segments(mq->queue, host->max_hw_segs);
+	blk_queue_max_segment_size(mq->queue, host->max_seg_size);
+
+	mq->queue->queuedata = mq;
+	mq->req = NULL;
+
+	mq->sg = kmalloc(sizeof(struct scatterlist) * host->max_phys_segs,
+			 GFP_KERNEL);
+	if (!mq->sg) {
+		ret = -ENOMEM;
+		goto cleanup;
+	}
+
+	init_completion(&mq->thread_complete);
+	init_waitqueue_head(&mq->thread_wq);
+	init_MUTEX(&mq->thread_sem);
+
+	ret = kernel_thread(mmc_queue_thread, mq, CLONE_KERNEL);
+	if (ret >= 0) {
+		wait_for_completion(&mq->thread_complete);
+		init_completion(&mq->thread_complete);
+		ret = 0;
+		goto out;
+	}
+
+ cleanup:
+	kfree(mq->sg);
+	mq->sg = NULL;
+
+	blk_cleanup_queue(mq->queue);
+ out:
+	return ret;
+}
+EXPORT_SYMBOL(mmc_init_queue);
+
+void mmc_cleanup_queue(struct mmc_queue *mq)
+{
+	mq->flags |= MMC_QUEUE_EXIT;
+	wake_up(&mq->thread_wq);
+	wait_for_completion(&mq->thread_complete);
+
+	kfree(mq->sg);
+	mq->sg = NULL;
+
+	blk_cleanup_queue(mq->queue);
+
+	mq->card = NULL;
+}
+EXPORT_SYMBOL(mmc_cleanup_queue);
+
+/**
+ * mmc_queue_suspend - suspend a MMC request queue
+ * @mq: MMC queue to suspend
+ *
+ * Stop the block request queue, and wait for our thread to
+ * complete any outstanding requests.  This ensures that we
+ * won't suspend while a request is being processed.
+ */
+void mmc_queue_suspend(struct mmc_queue *mq)
+{
+	request_queue_t *q = mq->queue;
+	unsigned long flags;
+
+	if (!(mq->flags & MMC_QUEUE_SUSPENDED)) {
+		mq->flags |= MMC_QUEUE_SUSPENDED;
+
+		spin_lock_irqsave(q->queue_lock, flags);
+		blk_stop_queue(q);
+		spin_unlock_irqrestore(q->queue_lock, flags);
+
+		down(&mq->thread_sem);
+	}
+}
+EXPORT_SYMBOL(mmc_queue_suspend);
+
+/**
+ * mmc_queue_resume - resume a previously suspended MMC request queue
+ * @mq: MMC queue to resume
+ */
+void mmc_queue_resume(struct mmc_queue *mq)
+{
+	request_queue_t *q = mq->queue;
+	unsigned long flags;
+
+	if (mq->flags & MMC_QUEUE_SUSPENDED) {
+		mq->flags &= ~MMC_QUEUE_SUSPENDED;
+
+		up(&mq->thread_sem);
+
+		spin_lock_irqsave(q->queue_lock, flags);
+		blk_start_queue(q);
+		spin_unlock_irqrestore(q->queue_lock, flags);
+	}
+}
+EXPORT_SYMBOL(mmc_queue_resume);
diff --git a/drivers/mmc/mmc_queue.h b/drivers/mmc/mmc_queue.h
new file mode 100644
index 00000000000..7182d2f69b4
--- /dev/null
+++ b/drivers/mmc/mmc_queue.h
@@ -0,0 +1,33 @@
+#ifndef MMC_QUEUE_H
+#define MMC_QUEUE_H
+
+struct request;
+struct task_struct;
+
+struct mmc_queue {
+	struct mmc_card		*card;
+	struct completion	thread_complete;
+	wait_queue_head_t	thread_wq;
+	struct semaphore	thread_sem;
+	unsigned int		flags;
+	struct request		*req;
+	int			(*prep_fn)(struct mmc_queue *, struct request *);
+	int			(*issue_fn)(struct mmc_queue *, struct request *);
+	void			*data;
+	struct request_queue	*queue;
+	struct scatterlist	*sg;
+};
+
+struct mmc_io_request {
+	struct request		*rq;
+	int			num;
+	struct mmc_command	selcmd;		/* mmc_queue private */
+	struct mmc_command	cmd[4];		/* max 4 commands */
+};
+
+extern int mmc_init_queue(struct mmc_queue *, struct mmc_card *, spinlock_t *);
+extern void mmc_cleanup_queue(struct mmc_queue *);
+extern void mmc_queue_suspend(struct mmc_queue *);
+extern void mmc_queue_resume(struct mmc_queue *);
+
+#endif
diff --git a/drivers/mmc/mmc_sysfs.c b/drivers/mmc/mmc_sysfs.c
new file mode 100644
index 00000000000..29a56e9cd5b
--- /dev/null
+++ b/drivers/mmc/mmc_sysfs.c
@@ -0,0 +1,238 @@
+/*
+ *  linux/drivers/mmc/mmc_sysfs.c
+ *
+ *  Copyright (C) 2003 Russell King, All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ *  MMC sysfs/driver model support.
+ */
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/device.h>
+
+#include <linux/mmc/card.h>
+#include <linux/mmc/host.h>
+
+#include "mmc.h"
+
+#define dev_to_mmc_card(d)	container_of(d, struct mmc_card, dev)
+#define to_mmc_driver(d)	container_of(d, struct mmc_driver, drv)
+
+#define MMC_ATTR(name, fmt, args...)					\
+static ssize_t mmc_##name##_show (struct device *dev, char *buf)	\
+{									\
+	struct mmc_card *card = dev_to_mmc_card(dev);			\
+	return sprintf(buf, fmt, args);					\
+}
+
+MMC_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
+	card->raw_cid[2], card->raw_cid[3]);
+MMC_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
+	card->raw_csd[2], card->raw_csd[3]);
+MMC_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
+MMC_ATTR(fwrev, "0x%x\n", card->cid.fwrev);
+MMC_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
+MMC_ATTR(manfid, "0x%06x\n", card->cid.manfid);
+MMC_ATTR(name, "%s\n", card->cid.prod_name);
+MMC_ATTR(oemid, "0x%04x\n", card->cid.oemid);
+MMC_ATTR(serial, "0x%08x\n", card->cid.serial);
+
+#define MMC_ATTR_RO(name) __ATTR(name, S_IRUGO, mmc_##name##_show, NULL)
+
+static struct device_attribute mmc_dev_attrs[] = {
+	MMC_ATTR_RO(cid),
+	MMC_ATTR_RO(csd),
+	MMC_ATTR_RO(date),
+	MMC_ATTR_RO(fwrev),
+	MMC_ATTR_RO(hwrev),
+	MMC_ATTR_RO(manfid),
+	MMC_ATTR_RO(name),
+	MMC_ATTR_RO(oemid),
+	MMC_ATTR_RO(serial),
+	__ATTR_NULL
+};
+
+
+static void mmc_release_card(struct device *dev)
+{
+	struct mmc_card *card = dev_to_mmc_card(dev);
+
+	kfree(card);
+}
+
+/*
+ * This currently matches any MMC driver to any MMC card - drivers
+ * themselves make the decision whether to drive this card in their
+ * probe method.  However, we force "bad" cards to fail.
+ */
+static int mmc_bus_match(struct device *dev, struct device_driver *drv)
+{
+	struct mmc_card *card = dev_to_mmc_card(dev);
+	return !mmc_card_bad(card);
+}
+
+static int
+mmc_bus_hotplug(struct device *dev, char **envp, int num_envp, char *buf,
+		int buf_size)
+{
+	struct mmc_card *card = dev_to_mmc_card(dev);
+	char ccc[13];
+	int i = 0;
+
+#define add_env(fmt,val)						\
+	({								\
+		int len, ret = -ENOMEM;					\
+		if (i < num_envp) {					\
+			envp[i++] = buf;				\
+			len = snprintf(buf, buf_size, fmt, val) + 1;	\
+			buf_size -= len;				\
+			buf += len;					\
+			if (buf_size >= 0)				\
+				ret = 0;				\
+		}							\
+		ret;							\
+	})
+
+	for (i = 0; i < 12; i++)
+		ccc[i] = card->csd.cmdclass & (1 << i) ? '1' : '0';
+	ccc[12] = '\0';
+
+	i = 0;
+	add_env("MMC_CCC=%s", ccc);
+	add_env("MMC_MANFID=%06x", card->cid.manfid);
+	add_env("MMC_NAME=%s", mmc_card_name(card));
+	add_env("MMC_OEMID=%04x", card->cid.oemid);
+
+	return 0;
+}
+
+static int mmc_bus_suspend(struct device *dev, pm_message_t state)
+{
+	struct mmc_driver *drv = to_mmc_driver(dev->driver);
+	struct mmc_card *card = dev_to_mmc_card(dev);
+	int ret = 0;
+
+	if (dev->driver && drv->suspend)
+		ret = drv->suspend(card, state);
+	return ret;
+}
+
+static int mmc_bus_resume(struct device *dev)
+{
+	struct mmc_driver *drv = to_mmc_driver(dev->driver);
+	struct mmc_card *card = dev_to_mmc_card(dev);
+	int ret = 0;
+
+	if (dev->driver && drv->resume)
+		ret = drv->resume(card);
+	return ret;
+}
+
+static struct bus_type mmc_bus_type = {
+	.name		= "mmc",
+	.dev_attrs	= mmc_dev_attrs,
+	.match		= mmc_bus_match,
+	.hotplug	= mmc_bus_hotplug,
+	.suspend	= mmc_bus_suspend,
+	.resume		= mmc_bus_resume,
+};
+
+
+static int mmc_drv_probe(struct device *dev)
+{
+	struct mmc_driver *drv = to_mmc_driver(dev->driver);
+	struct mmc_card *card = dev_to_mmc_card(dev);
+
+	return drv->probe(card);
+}
+
+static int mmc_drv_remove(struct device *dev)
+{
+	struct mmc_driver *drv = to_mmc_driver(dev->driver);
+	struct mmc_card *card = dev_to_mmc_card(dev);
+
+	drv->remove(card);
+
+	return 0;
+}
+
+
+/**
+ *	mmc_register_driver - register a media driver
+ *	@drv: MMC media driver
+ */
+int mmc_register_driver(struct mmc_driver *drv)
+{
+	drv->drv.bus = &mmc_bus_type;
+	drv->drv.probe = mmc_drv_probe;
+	drv->drv.remove = mmc_drv_remove;
+	return driver_register(&drv->drv);
+}
+
+EXPORT_SYMBOL(mmc_register_driver);
+
+/**
+ *	mmc_unregister_driver - unregister a media driver
+ *	@drv: MMC media driver
+ */
+void mmc_unregister_driver(struct mmc_driver *drv)
+{
+	drv->drv.bus = &mmc_bus_type;
+	driver_unregister(&drv->drv);
+}
+
+EXPORT_SYMBOL(mmc_unregister_driver);
+
+
+/*
+ * Internal function.  Initialise a MMC card structure.
+ */
+void mmc_init_card(struct mmc_card *card, struct mmc_host *host)
+{
+	memset(card, 0, sizeof(struct mmc_card));
+	card->host = host;
+	device_initialize(&card->dev);
+	card->dev.parent = card->host->dev;
+	card->dev.bus = &mmc_bus_type;
+	card->dev.release = mmc_release_card;
+}
+
+/*
+ * Internal function.  Register a new MMC card with the driver model.
+ */
+int mmc_register_card(struct mmc_card *card)
+{
+	snprintf(card->dev.bus_id, sizeof(card->dev.bus_id),
+		 "%s:%04x", card->host->host_name, card->rca);
+
+	return device_add(&card->dev);
+}
+
+/*
+ * Internal function.  Unregister a new MMC card with the
+ * driver model, and (eventually) free it.
+ */
+void mmc_remove_card(struct mmc_card *card)
+{
+	if (mmc_card_present(card))
+		device_del(&card->dev);
+
+	put_device(&card->dev);
+}
+
+
+static int __init mmc_init(void)
+{
+	return bus_register(&mmc_bus_type);
+}
+
+static void __exit mmc_exit(void)
+{
+	bus_unregister(&mmc_bus_type);
+}
+
+module_init(mmc_init);
+module_exit(mmc_exit);
diff --git a/drivers/mmc/mmci.c b/drivers/mmc/mmci.c
new file mode 100644
index 00000000000..3ee961c206b
--- /dev/null
+++ b/drivers/mmc/mmci.c
@@ -0,0 +1,680 @@
+/*
+ *  linux/drivers/mmc/mmci.c - ARM PrimeCell MMCI PL180/1 driver
+ *
+ *  Copyright (C) 2003 Deep Blue Solutions, Ltd, All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/device.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/highmem.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/protocol.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/scatterlist.h>
+#include <asm/hardware/amba.h>
+#include <asm/hardware/clock.h>
+#include <asm/mach/mmc.h>
+
+#include "mmci.h"
+
+#define DRIVER_NAME "mmci-pl18x"
+
+#ifdef CONFIG_MMC_DEBUG
+#define DBG(host,fmt,args...)	\
+	pr_debug("%s: %s: " fmt, host->mmc->host_name, __func__ , args)
+#else
+#define DBG(host,fmt,args...)	do { } while (0)
+#endif
+
+static unsigned int fmax = 515633;
+
+static void
+mmci_request_end(struct mmci_host *host, struct mmc_request *mrq)
+{
+	writel(0, host->base + MMCICOMMAND);
+
+	host->mrq = NULL;
+	host->cmd = NULL;
+
+	if (mrq->data)
+		mrq->data->bytes_xfered = host->data_xfered;
+
+	/*
+	 * Need to drop the host lock here; mmc_request_done may call
+	 * back into the driver...
+	 */
+	spin_unlock(&host->lock);
+	mmc_request_done(host->mmc, mrq);
+	spin_lock(&host->lock);
+}
+
+static void mmci_stop_data(struct mmci_host *host)
+{
+	writel(0, host->base + MMCIDATACTRL);
+	writel(0, host->base + MMCIMASK1);
+	host->data = NULL;
+}
+
+static void mmci_start_data(struct mmci_host *host, struct mmc_data *data)
+{
+	unsigned int datactrl, timeout, irqmask;
+	void __iomem *base;
+
+	DBG(host, "blksz %04x blks %04x flags %08x\n",
+	    1 << data->blksz_bits, data->blocks, data->flags);
+
+	host->data = data;
+	host->size = data->blocks << data->blksz_bits;
+	host->data_xfered = 0;
+
+	mmci_init_sg(host, data);
+
+	timeout = data->timeout_clks +
+		  ((unsigned long long)data->timeout_ns * host->cclk) /
+		   1000000000ULL;
+
+	base = host->base;
+	writel(timeout, base + MMCIDATATIMER);
+	writel(host->size, base + MMCIDATALENGTH);
+
+	datactrl = MCI_DPSM_ENABLE | data->blksz_bits << 4;
+	if (data->flags & MMC_DATA_READ) {
+		datactrl |= MCI_DPSM_DIRECTION;
+		irqmask = MCI_RXFIFOHALFFULLMASK;
+	} else {
+		/*
+		 * We don't actually need to include "FIFO empty" here
+		 * since its implicit in "FIFO half empty".
+		 */
+		irqmask = MCI_TXFIFOHALFEMPTYMASK;
+	}
+
+	writel(datactrl, base + MMCIDATACTRL);
+	writel(readl(base + MMCIMASK0) & ~MCI_DATAENDMASK, base + MMCIMASK0);
+	writel(irqmask, base + MMCIMASK1);
+}
+
+static void
+mmci_start_command(struct mmci_host *host, struct mmc_command *cmd, u32 c)
+{
+	void __iomem *base = host->base;
+
+	DBG(host, "op %02x arg %08x flags %08x\n",
+	    cmd->opcode, cmd->arg, cmd->flags);
+
+	if (readl(base + MMCICOMMAND) & MCI_CPSM_ENABLE) {
+		writel(0, base + MMCICOMMAND);
+		udelay(1);
+	}
+
+	c |= cmd->opcode | MCI_CPSM_ENABLE;
+	switch (cmd->flags & MMC_RSP_MASK) {
+	case MMC_RSP_NONE:
+	default:
+		break;
+	case MMC_RSP_LONG:
+		c |= MCI_CPSM_LONGRSP;
+	case MMC_RSP_SHORT:
+		c |= MCI_CPSM_RESPONSE;
+		break;
+	}
+	if (/*interrupt*/0)
+		c |= MCI_CPSM_INTERRUPT;
+
+	host->cmd = cmd;
+
+	writel(cmd->arg, base + MMCIARGUMENT);
+	writel(c, base + MMCICOMMAND);
+}
+
+static void
+mmci_data_irq(struct mmci_host *host, struct mmc_data *data,
+	      unsigned int status)
+{
+	if (status & MCI_DATABLOCKEND) {
+		host->data_xfered += 1 << data->blksz_bits;
+	}
+	if (status & (MCI_DATACRCFAIL|MCI_DATATIMEOUT|MCI_TXUNDERRUN|MCI_RXOVERRUN)) {
+		if (status & MCI_DATACRCFAIL)
+			data->error = MMC_ERR_BADCRC;
+		else if (status & MCI_DATATIMEOUT)
+			data->error = MMC_ERR_TIMEOUT;
+		else if (status & (MCI_TXUNDERRUN|MCI_RXOVERRUN))
+			data->error = MMC_ERR_FIFO;
+		status |= MCI_DATAEND;
+	}
+	if (status & MCI_DATAEND) {
+		mmci_stop_data(host);
+
+		if (!data->stop) {
+			mmci_request_end(host, data->mrq);
+		} else {
+			mmci_start_command(host, data->stop, 0);
+		}
+	}
+}
+
+static void
+mmci_cmd_irq(struct mmci_host *host, struct mmc_command *cmd,
+	     unsigned int status)
+{
+	void __iomem *base = host->base;
+
+	host->cmd = NULL;
+
+	cmd->resp[0] = readl(base + MMCIRESPONSE0);
+	cmd->resp[1] = readl(base + MMCIRESPONSE1);
+	cmd->resp[2] = readl(base + MMCIRESPONSE2);
+	cmd->resp[3] = readl(base + MMCIRESPONSE3);
+
+	if (status & MCI_CMDTIMEOUT) {
+		cmd->error = MMC_ERR_TIMEOUT;
+	} else if (status & MCI_CMDCRCFAIL && cmd->flags & MMC_RSP_CRC) {
+		cmd->error = MMC_ERR_BADCRC;
+	}
+
+	if (!cmd->data || cmd->error != MMC_ERR_NONE) {
+		mmci_request_end(host, cmd->mrq);
+	} else if (!(cmd->data->flags & MMC_DATA_READ)) {
+		mmci_start_data(host, cmd->data);
+	}
+}
+
+static int mmci_pio_read(struct mmci_host *host, char *buffer, unsigned int remain)
+{
+	void __iomem *base = host->base;
+	char *ptr = buffer;
+	u32 status;
+
+	do {
+		int count = host->size - (readl(base + MMCIFIFOCNT) << 2);
+
+		if (count > remain)
+			count = remain;
+
+		if (count <= 0)
+			break;
+
+		readsl(base + MMCIFIFO, ptr, count >> 2);
+
+		ptr += count;
+		remain -= count;
+
+		if (remain == 0)
+			break;
+
+		status = readl(base + MMCISTATUS);
+	} while (status & MCI_RXDATAAVLBL);
+
+	return ptr - buffer;
+}
+
+static int mmci_pio_write(struct mmci_host *host, char *buffer, unsigned int remain, u32 status)
+{
+	void __iomem *base = host->base;
+	char *ptr = buffer;
+
+	do {
+		unsigned int count, maxcnt;
+
+		maxcnt = status & MCI_TXFIFOEMPTY ? MCI_FIFOSIZE : MCI_FIFOHALFSIZE;
+		count = min(remain, maxcnt);
+
+		writesl(base + MMCIFIFO, ptr, count >> 2);
+
+		ptr += count;
+		remain -= count;
+
+		if (remain == 0)
+			break;
+
+		status = readl(base + MMCISTATUS);
+	} while (status & MCI_TXFIFOHALFEMPTY);
+
+	return ptr - buffer;
+}
+
+/*
+ * PIO data transfer IRQ handler.
+ */
+static irqreturn_t mmci_pio_irq(int irq, void *dev_id, struct pt_regs *regs)
+{
+	struct mmci_host *host = dev_id;
+	void __iomem *base = host->base;
+	u32 status;
+
+	status = readl(base + MMCISTATUS);
+
+	DBG(host, "irq1 %08x\n", status);
+
+	do {
+		unsigned long flags;
+		unsigned int remain, len;
+		char *buffer;
+
+		/*
+		 * For write, we only need to test the half-empty flag
+		 * here - if the FIFO is completely empty, then by
+		 * definition it is more than half empty.
+		 *
+		 * For read, check for data available.
+		 */
+		if (!(status & (MCI_TXFIFOHALFEMPTY|MCI_RXDATAAVLBL)))
+			break;
+
+		/*
+		 * Map the current scatter buffer.
+		 */
+		buffer = mmci_kmap_atomic(host, &flags) + host->sg_off;
+		remain = host->sg_ptr->length - host->sg_off;
+
+		len = 0;
+		if (status & MCI_RXACTIVE)
+			len = mmci_pio_read(host, buffer, remain);
+		if (status & MCI_TXACTIVE)
+			len = mmci_pio_write(host, buffer, remain, status);
+
+		/*
+		 * Unmap the buffer.
+		 */
+		mmci_kunmap_atomic(host, &flags);
+
+		host->sg_off += len;
+		host->size -= len;
+		remain -= len;
+
+		if (remain)
+			break;
+
+		if (!mmci_next_sg(host))
+			break;
+
+		status = readl(base + MMCISTATUS);
+	} while (1);
+
+	/*
+	 * If we're nearing the end of the read, switch to
+	 * "any data available" mode.
+	 */
+	if (status & MCI_RXACTIVE && host->size < MCI_FIFOSIZE)
+		writel(MCI_RXDATAAVLBLMASK, base + MMCIMASK1);
+
+	/*
+	 * If we run out of data, disable the data IRQs; this
+	 * prevents a race where the FIFO becomes empty before
+	 * the chip itself has disabled the data path, and
+	 * stops us racing with our data end IRQ.
+	 */
+	if (host->size == 0) {
+		writel(0, base + MMCIMASK1);
+		writel(readl(base + MMCIMASK0) | MCI_DATAENDMASK, base + MMCIMASK0);
+	}
+
+	return IRQ_HANDLED;
+}
+
+/*
+ * Handle completion of command and data transfers.
+ */
+static irqreturn_t mmci_irq(int irq, void *dev_id, struct pt_regs *regs)
+{
+	struct mmci_host *host = dev_id;
+	u32 status;
+	int ret = 0;
+
+	spin_lock(&host->lock);
+
+	do {
+		struct mmc_command *cmd;
+		struct mmc_data *data;
+
+		status = readl(host->base + MMCISTATUS);
+		status &= readl(host->base + MMCIMASK0);
+		writel(status, host->base + MMCICLEAR);
+
+		DBG(host, "irq0 %08x\n", status);
+
+		data = host->data;
+		if (status & (MCI_DATACRCFAIL|MCI_DATATIMEOUT|MCI_TXUNDERRUN|
+			      MCI_RXOVERRUN|MCI_DATAEND|MCI_DATABLOCKEND) && data)
+			mmci_data_irq(host, data, status);
+
+		cmd = host->cmd;
+		if (status & (MCI_CMDCRCFAIL|MCI_CMDTIMEOUT|MCI_CMDSENT|MCI_CMDRESPEND) && cmd)
+			mmci_cmd_irq(host, cmd, status);
+
+		ret = 1;
+	} while (status);
+
+	spin_unlock(&host->lock);
+
+	return IRQ_RETVAL(ret);
+}
+
+static void mmci_request(struct mmc_host *mmc, struct mmc_request *mrq)
+{
+	struct mmci_host *host = mmc_priv(mmc);
+
+	WARN_ON(host->mrq != NULL);
+
+	spin_lock_irq(&host->lock);
+
+	host->mrq = mrq;
+
+	if (mrq->data && mrq->data->flags & MMC_DATA_READ)
+		mmci_start_data(host, mrq->data);
+
+	mmci_start_command(host, mrq->cmd, 0);
+
+	spin_unlock_irq(&host->lock);
+}
+
+static void mmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
+{
+	struct mmci_host *host = mmc_priv(mmc);
+	u32 clk = 0, pwr = 0;
+
+	DBG(host, "clock %uHz busmode %u powermode %u Vdd %u\n",
+	    ios->clock, ios->bus_mode, ios->power_mode, ios->vdd);
+
+	if (ios->clock) {
+		if (ios->clock >= host->mclk) {
+			clk = MCI_CLK_BYPASS;
+			host->cclk = host->mclk;
+		} else {
+			clk = host->mclk / (2 * ios->clock) - 1;
+			if (clk > 256)
+				clk = 255;
+			host->cclk = host->mclk / (2 * (clk + 1));
+		}
+		clk |= MCI_CLK_ENABLE;
+	}
+
+	if (host->plat->translate_vdd)
+		pwr |= host->plat->translate_vdd(mmc_dev(mmc), ios->vdd);
+
+	switch (ios->power_mode) {
+	case MMC_POWER_OFF:
+		break;
+	case MMC_POWER_UP:
+		pwr |= MCI_PWR_UP;
+		break;
+	case MMC_POWER_ON:
+		pwr |= MCI_PWR_ON;
+		break;
+	}
+
+	if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN)
+		pwr |= MCI_ROD;
+
+	writel(clk, host->base + MMCICLOCK);
+
+	if (host->pwr != pwr) {
+		host->pwr = pwr;
+		writel(pwr, host->base + MMCIPOWER);
+	}
+}
+
+static struct mmc_host_ops mmci_ops = {
+	.request	= mmci_request,
+	.set_ios	= mmci_set_ios,
+};
+
+static void mmci_check_status(unsigned long data)
+{
+	struct mmci_host *host = (struct mmci_host *)data;
+	unsigned int status;
+
+	status = host->plat->status(mmc_dev(host->mmc));
+	if (status ^ host->oldstat)
+		mmc_detect_change(host->mmc);
+
+	host->oldstat = status;
+	mod_timer(&host->timer, jiffies + HZ);
+}
+
+static int mmci_probe(struct amba_device *dev, void *id)
+{
+	struct mmc_platform_data *plat = dev->dev.platform_data;
+	struct mmci_host *host;
+	struct mmc_host *mmc;
+	int ret;
+
+	/* must have platform data */
+	if (!plat) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	ret = amba_request_regions(dev, DRIVER_NAME);
+	if (ret)
+		goto out;
+
+	mmc = mmc_alloc_host(sizeof(struct mmci_host), &dev->dev);
+	if (!mmc) {
+		ret = -ENOMEM;
+		goto rel_regions;
+	}
+
+	host = mmc_priv(mmc);
+	host->clk = clk_get(&dev->dev, "MCLK");
+	if (IS_ERR(host->clk)) {
+		ret = PTR_ERR(host->clk);
+		host->clk = NULL;
+		goto host_free;
+	}
+
+	ret = clk_use(host->clk);
+	if (ret)
+		goto clk_free;
+
+	ret = clk_enable(host->clk);
+	if (ret)
+		goto clk_unuse;
+
+	host->plat = plat;
+	host->mclk = clk_get_rate(host->clk);
+	host->mmc = mmc;
+	host->base = ioremap(dev->res.start, SZ_4K);
+	if (!host->base) {
+		ret = -ENOMEM;
+		goto clk_disable;
+	}
+
+	mmc->ops = &mmci_ops;
+	mmc->f_min = (host->mclk + 511) / 512;
+	mmc->f_max = min(host->mclk, fmax);
+	mmc->ocr_avail = plat->ocr_mask;
+
+	/*
+	 * We can do SGIO
+	 */
+	mmc->max_hw_segs = 16;
+	mmc->max_phys_segs = NR_SG;
+
+	/*
+	 * Since we only have a 16-bit data length register, we must
+	 * ensure that we don't exceed 2^16-1 bytes in a single request.
+	 * Choose 64 (512-byte) sectors as the limit.
+	 */
+	mmc->max_sectors = 64;
+
+	/*
+	 * Set the maximum segment size.  Since we aren't doing DMA
+	 * (yet) we are only limited by the data length register.
+	 */
+	mmc->max_seg_size = mmc->max_sectors << 9;
+
+	spin_lock_init(&host->lock);
+
+	writel(0, host->base + MMCIMASK0);
+	writel(0, host->base + MMCIMASK1);
+	writel(0xfff, host->base + MMCICLEAR);
+
+	ret = request_irq(dev->irq[0], mmci_irq, SA_SHIRQ, DRIVER_NAME " (cmd)", host);
+	if (ret)
+		goto unmap;
+
+	ret = request_irq(dev->irq[1], mmci_pio_irq, SA_SHIRQ, DRIVER_NAME " (pio)", host);
+	if (ret)
+		goto irq0_free;
+
+	writel(MCI_IRQENABLE, host->base + MMCIMASK0);
+
+	amba_set_drvdata(dev, mmc);
+
+	mmc_add_host(mmc);
+
+	printk(KERN_INFO "%s: MMCI rev %x cfg %02x at 0x%08lx irq %d,%d\n",
+		mmc->host_name, amba_rev(dev), amba_config(dev),
+		dev->res.start, dev->irq[0], dev->irq[1]);
+
+	init_timer(&host->timer);
+	host->timer.data = (unsigned long)host;
+	host->timer.function = mmci_check_status;
+	host->timer.expires = jiffies + HZ;
+	add_timer(&host->timer);
+
+	return 0;
+
+ irq0_free:
+	free_irq(dev->irq[0], host);
+ unmap:
+	iounmap(host->base);
+ clk_disable:
+	clk_disable(host->clk);
+ clk_unuse:
+	clk_unuse(host->clk);
+ clk_free:
+	clk_put(host->clk);
+ host_free:
+	mmc_free_host(mmc);
+ rel_regions:
+	amba_release_regions(dev);
+ out:
+	return ret;
+}
+
+static int mmci_remove(struct amba_device *dev)
+{
+	struct mmc_host *mmc = amba_get_drvdata(dev);
+
+	amba_set_drvdata(dev, NULL);
+
+	if (mmc) {
+		struct mmci_host *host = mmc_priv(mmc);
+
+		del_timer_sync(&host->timer);
+
+		mmc_remove_host(mmc);
+
+		writel(0, host->base + MMCIMASK0);
+		writel(0, host->base + MMCIMASK1);
+
+		writel(0, host->base + MMCICOMMAND);
+		writel(0, host->base + MMCIDATACTRL);
+
+		free_irq(dev->irq[0], host);
+		free_irq(dev->irq[1], host);
+
+		iounmap(host->base);
+		clk_disable(host->clk);
+		clk_unuse(host->clk);
+		clk_put(host->clk);
+
+		mmc_free_host(mmc);
+
+		amba_release_regions(dev);
+	}
+
+	return 0;
+}
+
+#ifdef CONFIG_PM
+static int mmci_suspend(struct amba_device *dev, u32 state)
+{
+	struct mmc_host *mmc = amba_get_drvdata(dev);
+	int ret = 0;
+
+	if (mmc) {
+		struct mmci_host *host = mmc_priv(mmc);
+
+		ret = mmc_suspend_host(mmc, state);
+		if (ret == 0)
+			writel(0, host->base + MMCIMASK0);
+	}
+
+	return ret;
+}
+
+static int mmci_resume(struct amba_device *dev)
+{
+	struct mmc_host *mmc = amba_get_drvdata(dev);
+	int ret = 0;
+
+	if (mmc) {
+		struct mmci_host *host = mmc_priv(mmc);
+
+		writel(MCI_IRQENABLE, host->base + MMCIMASK0);
+
+		ret = mmc_resume_host(mmc);
+	}
+
+	return ret;
+}
+#else
+#define mmci_suspend	NULL
+#define mmci_resume	NULL
+#endif
+
+static struct amba_id mmci_ids[] = {
+	{
+		.id	= 0x00041180,
+		.mask	= 0x000fffff,
+	},
+	{
+		.id	= 0x00041181,
+		.mask	= 0x000fffff,
+	},
+	{ 0, 0 },
+};
+
+static struct amba_driver mmci_driver = {
+	.drv		= {
+		.name	= DRIVER_NAME,
+	},
+	.probe		= mmci_probe,
+	.remove		= mmci_remove,
+	.suspend	= mmci_suspend,
+	.resume		= mmci_resume,
+	.id_table	= mmci_ids,
+};
+
+static int __init mmci_init(void)
+{
+	return amba_driver_register(&mmci_driver);
+}
+
+static void __exit mmci_exit(void)
+{
+	amba_driver_unregister(&mmci_driver);
+}
+
+module_init(mmci_init);
+module_exit(mmci_exit);
+module_param(fmax, uint, 0444);
+
+MODULE_DESCRIPTION("ARM PrimeCell PL180/181 Multimedia Card Interface driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/mmc/mmci.h b/drivers/mmc/mmci.h
new file mode 100644
index 00000000000..4589bbd6819
--- /dev/null
+++ b/drivers/mmc/mmci.h
@@ -0,0 +1,179 @@
+/*
+ *  linux/drivers/mmc/mmci.h - ARM PrimeCell MMCI PL180/1 driver
+ *
+ *  Copyright (C) 2003 Deep Blue Solutions, Ltd, All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#define MMCIPOWER		0x000
+#define MCI_PWR_OFF		0x00
+#define MCI_PWR_UP		0x02
+#define MCI_PWR_ON		0x03
+#define MCI_OD			(1 << 6)
+#define MCI_ROD			(1 << 7)
+
+#define MMCICLOCK		0x004
+#define MCI_CLK_ENABLE		(1 << 8)
+#define MCI_CLK_PWRSAVE		(1 << 9)
+#define MCI_CLK_BYPASS		(1 << 10)
+
+#define MMCIARGUMENT		0x008
+#define MMCICOMMAND		0x00c
+#define MCI_CPSM_RESPONSE	(1 << 6)
+#define MCI_CPSM_LONGRSP	(1 << 7)
+#define MCI_CPSM_INTERRUPT	(1 << 8)
+#define MCI_CPSM_PENDING	(1 << 9)
+#define MCI_CPSM_ENABLE		(1 << 10)
+
+#define MMCIRESPCMD		0x010
+#define MMCIRESPONSE0		0x014
+#define MMCIRESPONSE1		0x018
+#define MMCIRESPONSE2		0x01c
+#define MMCIRESPONSE3		0x020
+#define MMCIDATATIMER		0x024
+#define MMCIDATALENGTH		0x028
+#define MMCIDATACTRL		0x02c
+#define MCI_DPSM_ENABLE		(1 << 0)
+#define MCI_DPSM_DIRECTION	(1 << 1)
+#define MCI_DPSM_MODE		(1 << 2)
+#define MCI_DPSM_DMAENABLE	(1 << 3)
+
+#define MMCIDATACNT		0x030
+#define MMCISTATUS		0x034
+#define MCI_CMDCRCFAIL		(1 << 0)
+#define MCI_DATACRCFAIL		(1 << 1)
+#define MCI_CMDTIMEOUT		(1 << 2)
+#define MCI_DATATIMEOUT		(1 << 3)
+#define MCI_TXUNDERRUN		(1 << 4)
+#define MCI_RXOVERRUN		(1 << 5)
+#define MCI_CMDRESPEND		(1 << 6)
+#define MCI_CMDSENT		(1 << 7)
+#define MCI_DATAEND		(1 << 8)
+#define MCI_DATABLOCKEND	(1 << 10)
+#define MCI_CMDACTIVE		(1 << 11)
+#define MCI_TXACTIVE		(1 << 12)
+#define MCI_RXACTIVE		(1 << 13)
+#define MCI_TXFIFOHALFEMPTY	(1 << 14)
+#define MCI_RXFIFOHALFFULL	(1 << 15)
+#define MCI_TXFIFOFULL		(1 << 16)
+#define MCI_RXFIFOFULL		(1 << 17)
+#define MCI_TXFIFOEMPTY		(1 << 18)
+#define MCI_RXFIFOEMPTY		(1 << 19)
+#define MCI_TXDATAAVLBL		(1 << 20)
+#define MCI_RXDATAAVLBL		(1 << 21)
+
+#define MMCICLEAR		0x038
+#define MCI_CMDCRCFAILCLR	(1 << 0)
+#define MCI_DATACRCFAILCLR	(1 << 1)
+#define MCI_CMDTIMEOUTCLR	(1 << 2)
+#define MCI_DATATIMEOUTCLR	(1 << 3)
+#define MCI_TXUNDERRUNCLR	(1 << 4)
+#define MCI_RXOVERRUNCLR	(1 << 5)
+#define MCI_CMDRESPENDCLR	(1 << 6)
+#define MCI_CMDSENTCLR		(1 << 7)
+#define MCI_DATAENDCLR		(1 << 8)
+#define MCI_DATABLOCKENDCLR	(1 << 10)
+
+#define MMCIMASK0		0x03c
+#define MCI_CMDCRCFAILMASK	(1 << 0)
+#define MCI_DATACRCFAILMASK	(1 << 1)
+#define MCI_CMDTIMEOUTMASK	(1 << 2)
+#define MCI_DATATIMEOUTMASK	(1 << 3)
+#define MCI_TXUNDERRUNMASK	(1 << 4)
+#define MCI_RXOVERRUNMASK	(1 << 5)
+#define MCI_CMDRESPENDMASK	(1 << 6)
+#define MCI_CMDSENTMASK		(1 << 7)
+#define MCI_DATAENDMASK		(1 << 8)
+#define MCI_DATABLOCKENDMASK	(1 << 10)
+#define MCI_CMDACTIVEMASK	(1 << 11)
+#define MCI_TXACTIVEMASK	(1 << 12)
+#define MCI_RXACTIVEMASK	(1 << 13)
+#define MCI_TXFIFOHALFEMPTYMASK	(1 << 14)
+#define MCI_RXFIFOHALFFULLMASK	(1 << 15)
+#define MCI_TXFIFOFULLMASK	(1 << 16)
+#define MCI_RXFIFOFULLMASK	(1 << 17)
+#define MCI_TXFIFOEMPTYMASK	(1 << 18)
+#define MCI_RXFIFOEMPTYMASK	(1 << 19)
+#define MCI_TXDATAAVLBLMASK	(1 << 20)
+#define MCI_RXDATAAVLBLMASK	(1 << 21)
+
+#define MMCIMASK1		0x040
+#define MMCIFIFOCNT		0x048
+#define MMCIFIFO		0x080 /* to 0x0bc */
+
+#define MCI_IRQENABLE	\
+	(MCI_CMDCRCFAILMASK|MCI_DATACRCFAILMASK|MCI_CMDTIMEOUTMASK|	\
+	MCI_DATATIMEOUTMASK|MCI_TXUNDERRUNMASK|MCI_RXOVERRUNMASK|	\
+	MCI_CMDRESPENDMASK|MCI_CMDSENTMASK|MCI_DATABLOCKENDMASK)
+
+/*
+ * The size of the FIFO in bytes.
+ */
+#define MCI_FIFOSIZE	(16*4)
+	
+#define MCI_FIFOHALFSIZE (MCI_FIFOSIZE / 2)
+
+#define NR_SG		16
+
+struct clk;
+
+struct mmci_host {
+	void __iomem		*base;
+	struct mmc_request	*mrq;
+	struct mmc_command	*cmd;
+	struct mmc_data		*data;
+	struct mmc_host		*mmc;
+	struct clk		*clk;
+
+	unsigned int		data_xfered;
+
+	spinlock_t		lock;
+
+	unsigned int		mclk;
+	unsigned int		cclk;
+	u32			pwr;
+	struct mmc_platform_data *plat;
+
+	struct timer_list	timer;
+	unsigned int		oldstat;
+
+	unsigned int		sg_len;
+
+	/* pio stuff */
+	struct scatterlist	*sg_ptr;
+	unsigned int		sg_off;
+	unsigned int		size;
+};
+
+static inline void mmci_init_sg(struct mmci_host *host, struct mmc_data *data)
+{
+	/*
+	 * Ideally, we want the higher levels to pass us a scatter list.
+	 */
+	host->sg_len = data->sg_len;
+	host->sg_ptr = data->sg;
+	host->sg_off = 0;
+}
+
+static inline int mmci_next_sg(struct mmci_host *host)
+{
+	host->sg_ptr++;
+	host->sg_off = 0;
+	return --host->sg_len;
+}
+
+static inline char *mmci_kmap_atomic(struct mmci_host *host, unsigned long *flags)
+{
+	struct scatterlist *sg = host->sg_ptr;
+
+	local_irq_save(*flags);
+	return kmap_atomic(sg->page, KM_BIO_SRC_IRQ) + sg->offset;
+}
+
+static inline void mmci_kunmap_atomic(struct mmci_host *host, unsigned long *flags)
+{
+	kunmap_atomic(host->sg_ptr->page, KM_BIO_SRC_IRQ);
+	local_irq_restore(*flags);
+}
diff --git a/drivers/mmc/pxamci.c b/drivers/mmc/pxamci.c
new file mode 100644
index 00000000000..f76deedf535
--- /dev/null
+++ b/drivers/mmc/pxamci.c
@@ -0,0 +1,610 @@
+/*
+ *  linux/drivers/mmc/pxa.c - PXA MMCI driver
+ *
+ *  Copyright (C) 2003 Russell King, All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ *  This hardware is really sick:
+ *   - No way to clear interrupts.
+ *   - Have to turn off the clock whenever we touch the device.
+ *   - Doesn't tell you how many data blocks were transferred.
+ *  Yuck!
+ *
+ *	1 and 3 byte data transfers not supported
+ *	max block length up to 1023
+ */
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/dma-mapping.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/protocol.h>
+
+#include <asm/dma.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/scatterlist.h>
+#include <asm/sizes.h>
+
+#include <asm/arch/pxa-regs.h>
+#include <asm/arch/mmc.h>
+
+#include "pxamci.h"
+
+#ifdef CONFIG_MMC_DEBUG
+#define DBG(x...)	printk(KERN_DEBUG x)
+#else
+#define DBG(x...)	do { } while (0)
+#endif
+
+#define DRIVER_NAME	"pxa2xx-mci"
+
+#define NR_SG	1
+
+struct pxamci_host {
+	struct mmc_host		*mmc;
+	spinlock_t		lock;
+	struct resource		*res;
+	void __iomem		*base;
+	int			irq;
+	int			dma;
+	unsigned int		clkrt;
+	unsigned int		cmdat;
+	unsigned int		imask;
+	unsigned int		power_mode;
+	struct pxamci_platform_data *pdata;
+
+	struct mmc_request	*mrq;
+	struct mmc_command	*cmd;
+	struct mmc_data		*data;
+
+	dma_addr_t		sg_dma;
+	struct pxa_dma_desc	*sg_cpu;
+	unsigned int		dma_len;
+
+	unsigned int		dma_dir;
+};
+
+static inline unsigned int ns_to_clocks(unsigned int ns)
+{
+	return (ns * (CLOCKRATE / 1000000) + 999) / 1000;
+}
+
+static void pxamci_stop_clock(struct pxamci_host *host)
+{
+	if (readl(host->base + MMC_STAT) & STAT_CLK_EN) {
+		unsigned long timeout = 10000;
+		unsigned int v;
+
+		writel(STOP_CLOCK, host->base + MMC_STRPCL);
+
+		do {
+			v = readl(host->base + MMC_STAT);
+			if (!(v & STAT_CLK_EN))
+				break;
+			udelay(1);
+		} while (timeout--);
+
+		if (v & STAT_CLK_EN)
+			dev_err(mmc_dev(host->mmc), "unable to stop clock\n");
+	}
+}
+
+static void pxamci_enable_irq(struct pxamci_host *host, unsigned int mask)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&host->lock, flags);
+	host->imask &= ~mask;
+	writel(host->imask, host->base + MMC_I_MASK);
+	spin_unlock_irqrestore(&host->lock, flags);
+}
+
+static void pxamci_disable_irq(struct pxamci_host *host, unsigned int mask)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&host->lock, flags);
+	host->imask |= mask;
+	writel(host->imask, host->base + MMC_I_MASK);
+	spin_unlock_irqrestore(&host->lock, flags);
+}
+
+static void pxamci_setup_data(struct pxamci_host *host, struct mmc_data *data)
+{
+	unsigned int nob = data->blocks;
+	unsigned int timeout;
+	u32 dcmd;
+	int i;
+
+	host->data = data;
+
+	if (data->flags & MMC_DATA_STREAM)
+		nob = 0xffff;
+
+	writel(nob, host->base + MMC_NOB);
+	writel(1 << data->blksz_bits, host->base + MMC_BLKLEN);
+
+	timeout = ns_to_clocks(data->timeout_ns) + data->timeout_clks;
+	writel((timeout + 255) / 256, host->base + MMC_RDTO);
+
+	if (data->flags & MMC_DATA_READ) {
+		host->dma_dir = DMA_FROM_DEVICE;
+		dcmd = DCMD_INCTRGADDR | DCMD_FLOWTRG;
+		DRCMRTXMMC = 0;
+		DRCMRRXMMC = host->dma | DRCMR_MAPVLD;
+	} else {
+		host->dma_dir = DMA_TO_DEVICE;
+		dcmd = DCMD_INCSRCADDR | DCMD_FLOWSRC;
+		DRCMRRXMMC = 0;
+		DRCMRTXMMC = host->dma | DRCMR_MAPVLD;
+	}
+
+	dcmd |= DCMD_BURST32 | DCMD_WIDTH1;
+
+	host->dma_len = dma_map_sg(mmc_dev(host->mmc), data->sg, data->sg_len,
+				   host->dma_dir);
+
+	for (i = 0; i < host->dma_len; i++) {
+		if (data->flags & MMC_DATA_READ) {
+			host->sg_cpu[i].dsadr = host->res->start + MMC_RXFIFO;
+			host->sg_cpu[i].dtadr = sg_dma_address(&data->sg[i]);
+		} else {
+			host->sg_cpu[i].dsadr = sg_dma_address(&data->sg[i]);
+			host->sg_cpu[i].dtadr = host->res->start + MMC_TXFIFO;
+		}
+		host->sg_cpu[i].dcmd = dcmd | sg_dma_len(&data->sg[i]);
+		host->sg_cpu[i].ddadr = host->sg_dma + (i + 1) *
+					sizeof(struct pxa_dma_desc);
+	}
+	host->sg_cpu[host->dma_len - 1].ddadr = DDADR_STOP;
+	wmb();
+
+	DDADR(host->dma) = host->sg_dma;
+	DCSR(host->dma) = DCSR_RUN;
+}
+
+static void pxamci_start_cmd(struct pxamci_host *host, struct mmc_command *cmd, unsigned int cmdat)
+{
+	WARN_ON(host->cmd != NULL);
+	host->cmd = cmd;
+
+	if (cmd->flags & MMC_RSP_BUSY)
+		cmdat |= CMDAT_BUSY;
+
+	switch (cmd->flags & (MMC_RSP_MASK | MMC_RSP_CRC)) {
+	case MMC_RSP_SHORT | MMC_RSP_CRC:
+		cmdat |= CMDAT_RESP_SHORT;
+		break;
+	case MMC_RSP_SHORT:
+		cmdat |= CMDAT_RESP_R3;
+		break;
+	case MMC_RSP_LONG | MMC_RSP_CRC:
+		cmdat |= CMDAT_RESP_R2;
+		break;
+	default:
+		break;
+	}
+
+	writel(cmd->opcode, host->base + MMC_CMD);
+	writel(cmd->arg >> 16, host->base + MMC_ARGH);
+	writel(cmd->arg & 0xffff, host->base + MMC_ARGL);
+	writel(cmdat, host->base + MMC_CMDAT);
+	writel(host->clkrt, host->base + MMC_CLKRT);
+
+	writel(START_CLOCK, host->base + MMC_STRPCL);
+
+	pxamci_enable_irq(host, END_CMD_RES);
+}
+
+static void pxamci_finish_request(struct pxamci_host *host, struct mmc_request *mrq)
+{
+	DBG("PXAMCI: request done\n");
+	host->mrq = NULL;
+	host->cmd = NULL;
+	host->data = NULL;
+	mmc_request_done(host->mmc, mrq);
+}
+
+static int pxamci_cmd_done(struct pxamci_host *host, unsigned int stat)
+{
+	struct mmc_command *cmd = host->cmd;
+	int i;
+	u32 v;
+
+	if (!cmd)
+		return 0;
+
+	host->cmd = NULL;
+
+	/*
+	 * Did I mention this is Sick.  We always need to
+	 * discard the upper 8 bits of the first 16-bit word.
+	 */
+	v = readl(host->base + MMC_RES) & 0xffff;
+	for (i = 0; i < 4; i++) {
+		u32 w1 = readl(host->base + MMC_RES) & 0xffff;
+		u32 w2 = readl(host->base + MMC_RES) & 0xffff;
+		cmd->resp[i] = v << 24 | w1 << 8 | w2 >> 8;
+		v = w2;
+	}
+
+	if (stat & STAT_TIME_OUT_RESPONSE) {
+		cmd->error = MMC_ERR_TIMEOUT;
+	} else if (stat & STAT_RES_CRC_ERR && cmd->flags & MMC_RSP_CRC) {
+#ifdef CONFIG_PXA27x
+		/*
+		 * workaround for erratum #42:
+		 * Intel PXA27x Family Processor Specification Update Rev 001
+		 */
+		if (cmd->opcode == MMC_ALL_SEND_CID ||
+		    cmd->opcode == MMC_SEND_CSD ||
+		    cmd->opcode == MMC_SEND_CID) {
+			/* a bogus CRC error can appear if the msb of
+			   the 15 byte response is a one */
+			if ((cmd->resp[0] & 0x80000000) == 0)
+				cmd->error = MMC_ERR_BADCRC;
+		} else {
+			DBG("ignoring CRC from command %d - *risky*\n",cmd->opcode);
+		}
+#else
+		cmd->error = MMC_ERR_BADCRC;
+#endif
+	}
+
+	pxamci_disable_irq(host, END_CMD_RES);
+	if (host->data && cmd->error == MMC_ERR_NONE) {
+		pxamci_enable_irq(host, DATA_TRAN_DONE);
+	} else {
+		pxamci_finish_request(host, host->mrq);
+	}
+
+	return 1;
+}
+
+static int pxamci_data_done(struct pxamci_host *host, unsigned int stat)
+{
+	struct mmc_data *data = host->data;
+
+	if (!data)
+		return 0;
+
+	DCSR(host->dma) = 0;
+	dma_unmap_sg(mmc_dev(host->mmc), data->sg, host->dma_len,
+		     host->dma_dir);
+
+	if (stat & STAT_READ_TIME_OUT)
+		data->error = MMC_ERR_TIMEOUT;
+	else if (stat & (STAT_CRC_READ_ERROR|STAT_CRC_WRITE_ERROR))
+		data->error = MMC_ERR_BADCRC;
+
+	/*
+	 * There appears to be a hardware design bug here.  There seems to
+	 * be no way to find out how much data was transferred to the card.
+	 * This means that if there was an error on any block, we mark all
+	 * data blocks as being in error.
+	 */
+	if (data->error == MMC_ERR_NONE)
+		data->bytes_xfered = data->blocks << data->blksz_bits;
+	else
+		data->bytes_xfered = 0;
+
+	pxamci_disable_irq(host, DATA_TRAN_DONE);
+
+	host->data = NULL;
+	if (host->mrq->stop && data->error == MMC_ERR_NONE) {
+		pxamci_stop_clock(host);
+		pxamci_start_cmd(host, host->mrq->stop, 0);
+	} else {
+		pxamci_finish_request(host, host->mrq);
+	}
+
+	return 1;
+}
+
+static irqreturn_t pxamci_irq(int irq, void *devid, struct pt_regs *regs)
+{
+	struct pxamci_host *host = devid;
+	unsigned int ireg;
+	int handled = 0;
+
+	ireg = readl(host->base + MMC_I_REG);
+
+	DBG("PXAMCI: irq %08x\n", ireg);
+
+	if (ireg) {
+		unsigned stat = readl(host->base + MMC_STAT);
+
+		DBG("PXAMCI: stat %08x\n", stat);
+
+		if (ireg & END_CMD_RES)
+			handled |= pxamci_cmd_done(host, stat);
+		if (ireg & DATA_TRAN_DONE)
+			handled |= pxamci_data_done(host, stat);
+	}
+
+	return IRQ_RETVAL(handled);
+}
+
+static void pxamci_request(struct mmc_host *mmc, struct mmc_request *mrq)
+{
+	struct pxamci_host *host = mmc_priv(mmc);
+	unsigned int cmdat;
+
+	WARN_ON(host->mrq != NULL);
+
+	host->mrq = mrq;
+
+	pxamci_stop_clock(host);
+
+	cmdat = host->cmdat;
+	host->cmdat &= ~CMDAT_INIT;
+
+	if (mrq->data) {
+		pxamci_setup_data(host, mrq->data);
+
+		cmdat &= ~CMDAT_BUSY;
+		cmdat |= CMDAT_DATAEN | CMDAT_DMAEN;
+		if (mrq->data->flags & MMC_DATA_WRITE)
+			cmdat |= CMDAT_WRITE;
+
+		if (mrq->data->flags & MMC_DATA_STREAM)
+			cmdat |= CMDAT_STREAM;
+	}
+
+	pxamci_start_cmd(host, mrq->cmd, cmdat);
+}
+
+static void pxamci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
+{
+	struct pxamci_host *host = mmc_priv(mmc);
+
+	DBG("pxamci_set_ios: clock %u power %u vdd %u.%02u\n",
+	    ios->clock, ios->power_mode, ios->vdd / 100,
+	    ios->vdd % 100);
+
+	if (ios->clock) {
+		unsigned int clk = CLOCKRATE / ios->clock;
+		if (CLOCKRATE / clk > ios->clock)
+			clk <<= 1;
+		host->clkrt = fls(clk) - 1;
+		pxa_set_cken(CKEN12_MMC, 1);
+
+		/*
+		 * we write clkrt on the next command
+		 */
+	} else {
+		pxamci_stop_clock(host);
+		pxa_set_cken(CKEN12_MMC, 0);
+	}
+
+	if (host->power_mode != ios->power_mode) {
+		host->power_mode = ios->power_mode;
+
+		if (host->pdata && host->pdata->setpower)
+			host->pdata->setpower(mmc->dev, ios->vdd);
+
+		if (ios->power_mode == MMC_POWER_ON)
+			host->cmdat |= CMDAT_INIT;
+	}
+
+	DBG("pxamci_set_ios: clkrt = %x cmdat = %x\n",
+	    host->clkrt, host->cmdat);
+}
+
+static struct mmc_host_ops pxamci_ops = {
+	.request	= pxamci_request,
+	.set_ios	= pxamci_set_ios,
+};
+
+static void pxamci_dma_irq(int dma, void *devid, struct pt_regs *regs)
+{
+	printk(KERN_ERR "DMA%d: IRQ???\n", dma);
+	DCSR(dma) = DCSR_STARTINTR|DCSR_ENDINTR|DCSR_BUSERR;
+}
+
+static irqreturn_t pxamci_detect_irq(int irq, void *devid, struct pt_regs *regs)
+{
+	mmc_detect_change(devid);
+	return IRQ_HANDLED;
+}
+
+static int pxamci_probe(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct mmc_host *mmc;
+	struct pxamci_host *host = NULL;
+	struct resource *r;
+	int ret, irq;
+
+	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	irq = platform_get_irq(pdev, 0);
+	if (!r || irq == NO_IRQ)
+		return -ENXIO;
+
+	r = request_mem_region(r->start, SZ_4K, DRIVER_NAME);
+	if (!r)
+		return -EBUSY;
+
+	mmc = mmc_alloc_host(sizeof(struct pxamci_host), dev);
+	if (!mmc) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	mmc->ops = &pxamci_ops;
+	mmc->f_min = CLOCKRATE_MIN;
+	mmc->f_max = CLOCKRATE_MAX;
+
+	/*
+	 * We can do SG-DMA, but we don't because we never know how much
+	 * data we successfully wrote to the card.
+	 */
+	mmc->max_phys_segs = NR_SG;
+
+	/*
+	 * Our hardware DMA can handle a maximum of one page per SG entry.
+	 */
+	mmc->max_seg_size = PAGE_SIZE;
+
+	host = mmc_priv(mmc);
+	host->mmc = mmc;
+	host->dma = -1;
+	host->pdata = pdev->dev.platform_data;
+	mmc->ocr_avail = host->pdata ?
+			 host->pdata->ocr_mask :
+			 MMC_VDD_32_33|MMC_VDD_33_34;
+
+	host->sg_cpu = dma_alloc_coherent(dev, PAGE_SIZE, &host->sg_dma, GFP_KERNEL);
+	if (!host->sg_cpu) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	spin_lock_init(&host->lock);
+	host->res = r;
+	host->irq = irq;
+	host->imask = MMC_I_MASK_ALL;
+
+	host->base = ioremap(r->start, SZ_4K);
+	if (!host->base) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	/*
+	 * Ensure that the host controller is shut down, and setup
+	 * with our defaults.
+	 */
+	pxamci_stop_clock(host);
+	writel(0, host->base + MMC_SPI);
+	writel(64, host->base + MMC_RESTO);
+	writel(host->imask, host->base + MMC_I_MASK);
+
+	host->dma = pxa_request_dma(DRIVER_NAME, DMA_PRIO_LOW,
+				    pxamci_dma_irq, host);
+	if (host->dma < 0) {
+		ret = -EBUSY;
+		goto out;
+	}
+
+	ret = request_irq(host->irq, pxamci_irq, 0, DRIVER_NAME, host);
+	if (ret)
+		goto out;
+
+	dev_set_drvdata(dev, mmc);
+
+	if (host->pdata && host->pdata->init)
+		host->pdata->init(dev, pxamci_detect_irq, mmc);
+
+	mmc_add_host(mmc);
+
+	return 0;
+
+ out:
+	if (host) {
+		if (host->dma >= 0)
+			pxa_free_dma(host->dma);
+		if (host->base)
+			iounmap(host->base);
+		if (host->sg_cpu)
+			dma_free_coherent(dev, PAGE_SIZE, host->sg_cpu, host->sg_dma);
+	}
+	if (mmc)
+		mmc_free_host(mmc);
+	release_resource(r);
+	return ret;
+}
+
+static int pxamci_remove(struct device *dev)
+{
+	struct mmc_host *mmc = dev_get_drvdata(dev);
+
+	dev_set_drvdata(dev, NULL);
+
+	if (mmc) {
+		struct pxamci_host *host = mmc_priv(mmc);
+
+		if (host->pdata && host->pdata->exit)
+			host->pdata->exit(dev, mmc);
+
+		mmc_remove_host(mmc);
+
+		pxamci_stop_clock(host);
+		writel(TXFIFO_WR_REQ|RXFIFO_RD_REQ|CLK_IS_OFF|STOP_CMD|
+		       END_CMD_RES|PRG_DONE|DATA_TRAN_DONE,
+		       host->base + MMC_I_MASK);
+
+		DRCMRRXMMC = 0;
+		DRCMRTXMMC = 0;
+
+		free_irq(host->irq, host);
+		pxa_free_dma(host->dma);
+		iounmap(host->base);
+		dma_free_coherent(dev, PAGE_SIZE, host->sg_cpu, host->sg_dma);
+
+		release_resource(host->res);
+
+		mmc_free_host(mmc);
+	}
+	return 0;
+}
+
+#ifdef CONFIG_PM
+static int pxamci_suspend(struct device *dev, u32 state, u32 level)
+{
+	struct mmc_host *mmc = dev_get_drvdata(dev);
+	int ret = 0;
+
+	if (mmc && level == SUSPEND_DISABLE)
+		ret = mmc_suspend_host(mmc, state);
+
+	return ret;
+}
+
+static int pxamci_resume(struct device *dev, u32 level)
+{
+	struct mmc_host *mmc = dev_get_drvdata(dev);
+	int ret = 0;
+
+	if (mmc && level == RESUME_ENABLE)
+		ret = mmc_resume_host(mmc);
+
+	return ret;
+}
+#else
+#define pxamci_suspend	NULL
+#define pxamci_resume	NULL
+#endif
+
+static struct device_driver pxamci_driver = {
+	.name		= DRIVER_NAME,
+	.bus		= &platform_bus_type,
+	.probe		= pxamci_probe,
+	.remove		= pxamci_remove,
+	.suspend	= pxamci_suspend,
+	.resume		= pxamci_resume,
+};
+
+static int __init pxamci_init(void)
+{
+	return driver_register(&pxamci_driver);
+}
+
+static void __exit pxamci_exit(void)
+{
+	driver_unregister(&pxamci_driver);
+}
+
+module_init(pxamci_init);
+module_exit(pxamci_exit);
+
+MODULE_DESCRIPTION("PXA Multimedia Card Interface Driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/mmc/pxamci.h b/drivers/mmc/pxamci.h
new file mode 100644
index 00000000000..1b163220df2
--- /dev/null
+++ b/drivers/mmc/pxamci.h
@@ -0,0 +1,124 @@
+#undef MMC_STRPCL
+#undef MMC_STAT
+#undef MMC_CLKRT
+#undef MMC_SPI
+#undef MMC_CMDAT
+#undef MMC_RESTO
+#undef MMC_RDTO
+#undef MMC_BLKLEN
+#undef MMC_NOB
+#undef MMC_PRTBUF
+#undef MMC_I_MASK
+#undef END_CMD_RES
+#undef PRG_DONE
+#undef DATA_TRAN_DONE
+#undef MMC_I_REG
+#undef MMC_CMD
+#undef MMC_ARGH
+#undef MMC_ARGL
+#undef MMC_RES
+#undef MMC_RXFIFO
+#undef MMC_TXFIFO
+
+#define MMC_STRPCL	0x0000
+#define STOP_CLOCK		(1 << 0)
+#define START_CLOCK		(2 << 0)
+
+#define MMC_STAT	0x0004
+#define STAT_END_CMD_RES		(1 << 13)
+#define STAT_PRG_DONE			(1 << 12)
+#define STAT_DATA_TRAN_DONE		(1 << 11)
+#define STAT_CLK_EN			(1 << 8)
+#define STAT_RECV_FIFO_FULL		(1 << 7)
+#define STAT_XMIT_FIFO_EMPTY		(1 << 6)
+#define STAT_RES_CRC_ERR		(1 << 5)
+#define STAT_SPI_READ_ERROR_TOKEN	(1 << 4)
+#define STAT_CRC_READ_ERROR		(1 << 3)
+#define STAT_CRC_WRITE_ERROR		(1 << 2)
+#define STAT_TIME_OUT_RESPONSE		(1 << 1)
+#define STAT_READ_TIME_OUT		(1 << 0)
+
+#define MMC_CLKRT	0x0008		/* 3 bit */
+
+#define MMC_SPI		0x000c
+#define SPI_CS_ADDRESS		(1 << 3)
+#define SPI_CS_EN		(1 << 2)
+#define CRC_ON			(1 << 1)
+#define SPI_EN			(1 << 0)
+
+#define MMC_CMDAT	0x0010
+#define CMDAT_DMAEN		(1 << 7)
+#define CMDAT_INIT		(1 << 6)
+#define CMDAT_BUSY		(1 << 5)
+#define CMDAT_STREAM		(1 << 4)	/* 1 = stream */
+#define CMDAT_WRITE		(1 << 3)	/* 1 = write */
+#define CMDAT_DATAEN		(1 << 2)
+#define CMDAT_RESP_NONE		(0 << 0)
+#define CMDAT_RESP_SHORT	(1 << 0)
+#define CMDAT_RESP_R2		(2 << 0)
+#define CMDAT_RESP_R3		(3 << 0)
+
+#define MMC_RESTO	0x0014	/* 7 bit */
+
+#define MMC_RDTO	0x0018	/* 16 bit */
+
+#define MMC_BLKLEN	0x001c	/* 10 bit */
+
+#define MMC_NOB		0x0020	/* 16 bit */
+
+#define MMC_PRTBUF	0x0024
+#define BUF_PART_FULL		(1 << 0)
+
+#define MMC_I_MASK	0x0028
+
+/*PXA27x MMC interrupts*/
+#define SDIO_SUSPEND_ACK  	(1 << 12)
+#define SDIO_INT          	(1 << 11)
+#define RD_STALLED        	(1 << 10)
+#define RES_ERR           	(1 << 9)
+#define DAT_ERR           	(1 << 8)
+#define TINT              	(1 << 7)
+
+/*PXA2xx MMC interrupts*/
+#define TXFIFO_WR_REQ		(1 << 6)
+#define RXFIFO_RD_REQ		(1 << 5)
+#define CLK_IS_OFF		(1 << 4)
+#define STOP_CMD		(1 << 3)
+#define END_CMD_RES		(1 << 2)
+#define PRG_DONE		(1 << 1)
+#define DATA_TRAN_DONE		(1 << 0)
+
+#ifdef CONFIG_PXA27x
+#define MMC_I_MASK_ALL          0x00001fff
+#else
+#define MMC_I_MASK_ALL          0x0000007f
+#endif
+
+#define MMC_I_REG	0x002c
+/* same as MMC_I_MASK */
+
+#define MMC_CMD		0x0030
+
+#define MMC_ARGH	0x0034	/* 16 bit */
+
+#define MMC_ARGL	0x0038	/* 16 bit */
+
+#define MMC_RES		0x003c	/* 16 bit */
+
+#define MMC_RXFIFO	0x0040	/* 8 bit */
+
+#define MMC_TXFIFO	0x0044	/* 8 bit */
+
+/*
+ * The base MMC clock rate
+ */
+#ifdef CONFIG_PXA27x
+#define CLOCKRATE_MIN	304688
+#define CLOCKRATE_MAX	19500000
+#else
+#define CLOCKRATE_MIN	312500
+#define CLOCKRATE_MAX	20000000
+#endif
+
+#define CLOCKRATE	CLOCKRATE_MAX
+
diff --git a/drivers/mmc/wbsd.c b/drivers/mmc/wbsd.c
new file mode 100644
index 00000000000..938bca0414e
--- /dev/null
+++ b/drivers/mmc/wbsd.c
@@ -0,0 +1,1651 @@
+/*
+ *  linux/drivers/mmc/wbsd.c - Winbond W83L51xD SD/MMC driver
+ *
+ *  Copyright (C) 2004-2005 Pierre Ossman, All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ *
+ * Warning!
+ *
+ * Changes to the FIFO system should be done with extreme care since
+ * the hardware is full of bugs related to the FIFO. Known issues are:
+ *
+ * - FIFO size field in FSR is always zero.
+ *
+ * - FIFO interrupts tend not to work as they should. Interrupts are
+ *   triggered only for full/empty events, not for threshold values.
+ *
+ * - On APIC systems the FIFO empty interrupt is sometimes lost.
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/device.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/highmem.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/protocol.h>
+
+#include <asm/io.h>
+#include <asm/dma.h>
+#include <asm/scatterlist.h>
+
+#include "wbsd.h"
+
+#define DRIVER_NAME "wbsd"
+#define DRIVER_VERSION "1.1"
+
+#ifdef CONFIG_MMC_DEBUG
+#define DBG(x...) \
+	printk(KERN_DEBUG DRIVER_NAME ": " x)
+#define DBGF(f, x...) \
+	printk(KERN_DEBUG DRIVER_NAME " [%s()]: " f, __func__ , ##x)
+#else
+#define DBG(x...)	do { } while (0)
+#define DBGF(x...)	do { } while (0)
+#endif
+
+static unsigned int io = 0x248;
+static unsigned int irq = 6;
+static int dma = 2;
+
+#ifdef CONFIG_MMC_DEBUG
+void DBG_REG(int reg, u8 value)
+{
+	int i;
+	
+	printk(KERN_DEBUG "wbsd: Register %d: 0x%02X %3d '%c' ",
+		reg, (int)value, (int)value, (value < 0x20)?'.':value);
+	
+	for (i = 7;i >= 0;i--)
+	{
+		if (value & (1 << i))
+			printk("x");
+		else
+			printk(".");
+	}
+	
+	printk("\n");
+}
+#else
+#define DBG_REG(r, v) do {}  while (0)
+#endif
+
+/*
+ * Basic functions
+ */
+
+static inline void wbsd_unlock_config(struct wbsd_host* host)
+{
+	outb(host->unlock_code, host->config);
+	outb(host->unlock_code, host->config);
+}
+
+static inline void wbsd_lock_config(struct wbsd_host* host)
+{
+	outb(LOCK_CODE, host->config);
+}
+
+static inline void wbsd_write_config(struct wbsd_host* host, u8 reg, u8 value)
+{
+	outb(reg, host->config);
+	outb(value, host->config + 1);
+}
+
+static inline u8 wbsd_read_config(struct wbsd_host* host, u8 reg)
+{
+	outb(reg, host->config);
+	return inb(host->config + 1);
+}
+
+static inline void wbsd_write_index(struct wbsd_host* host, u8 index, u8 value)
+{
+	outb(index, host->base + WBSD_IDXR);
+	outb(value, host->base + WBSD_DATAR);
+}
+
+static inline u8 wbsd_read_index(struct wbsd_host* host, u8 index)
+{
+	outb(index, host->base + WBSD_IDXR);
+	return inb(host->base + WBSD_DATAR);
+}
+
+/*
+ * Common routines
+ */
+
+static void wbsd_init_device(struct wbsd_host* host)
+{
+	u8 setup, ier;
+	
+	/*
+	 * Reset chip (SD/MMC part) and fifo.
+	 */
+	setup = wbsd_read_index(host, WBSD_IDX_SETUP);
+	setup |= WBSD_FIFO_RESET | WBSD_SOFT_RESET;
+	wbsd_write_index(host, WBSD_IDX_SETUP, setup);
+	
+	/*
+	 * Read back default clock.
+	 */
+	host->clk = wbsd_read_index(host, WBSD_IDX_CLK);
+
+	/*
+	 * Power down port.
+	 */
+	outb(WBSD_POWER_N, host->base + WBSD_CSR);
+	
+	/*
+	 * Set maximum timeout.
+	 */
+	wbsd_write_index(host, WBSD_IDX_TAAC, 0x7F);
+	
+	/*
+	 * Enable interesting interrupts.
+	 */
+	ier = 0;
+	ier |= WBSD_EINT_CARD;
+	ier |= WBSD_EINT_FIFO_THRE;
+	ier |= WBSD_EINT_CCRC;
+	ier |= WBSD_EINT_TIMEOUT;
+	ier |= WBSD_EINT_CRC;
+	ier |= WBSD_EINT_TC;
+
+	outb(ier, host->base + WBSD_EIR);
+
+	/*
+	 * Clear interrupts.
+	 */
+	inb(host->base + WBSD_ISR);
+}
+
+static void wbsd_reset(struct wbsd_host* host)
+{
+	u8 setup;
+	
+	printk(KERN_ERR DRIVER_NAME ": Resetting chip\n");
+	
+	/*
+	 * Soft reset of chip (SD/MMC part).
+	 */
+	setup = wbsd_read_index(host, WBSD_IDX_SETUP);
+	setup |= WBSD_SOFT_RESET;
+	wbsd_write_index(host, WBSD_IDX_SETUP, setup);
+}
+
+static void wbsd_request_end(struct wbsd_host* host, struct mmc_request* mrq)
+{
+	unsigned long dmaflags;
+	
+	DBGF("Ending request, cmd (%x)\n", mrq->cmd->opcode);
+	
+	if (host->dma >= 0)
+	{
+		/*
+		 * Release ISA DMA controller.
+		 */
+		dmaflags = claim_dma_lock();
+		disable_dma(host->dma);
+		clear_dma_ff(host->dma);
+		release_dma_lock(dmaflags);
+
+		/*
+		 * Disable DMA on host.
+		 */
+		wbsd_write_index(host, WBSD_IDX_DMA, 0);
+	}
+	
+	host->mrq = NULL;
+
+	/*
+	 * MMC layer might call back into the driver so first unlock.
+	 */
+	spin_unlock(&host->lock);
+	mmc_request_done(host->mmc, mrq);
+	spin_lock(&host->lock);
+}
+
+/*
+ * Scatter/gather functions
+ */
+
+static inline void wbsd_init_sg(struct wbsd_host* host, struct mmc_data* data)
+{
+	/*
+	 * Get info. about SG list from data structure.
+	 */
+	host->cur_sg = data->sg;
+	host->num_sg = data->sg_len;
+
+	host->offset = 0;
+	host->remain = host->cur_sg->length;
+}
+
+static inline int wbsd_next_sg(struct wbsd_host* host)
+{
+	/*
+	 * Skip to next SG entry.
+	 */
+	host->cur_sg++;
+	host->num_sg--;
+
+	/*
+	 * Any entries left?
+	 */
+	if (host->num_sg > 0)
+	  {
+	    host->offset = 0;
+	    host->remain = host->cur_sg->length;
+	  }
+	
+	return host->num_sg;
+}
+
+static inline char* wbsd_kmap_sg(struct wbsd_host* host)
+{
+	host->mapped_sg = kmap_atomic(host->cur_sg->page, KM_BIO_SRC_IRQ) +
+		host->cur_sg->offset;
+	return host->mapped_sg;
+}
+
+static inline void wbsd_kunmap_sg(struct wbsd_host* host)
+{
+	kunmap_atomic(host->mapped_sg, KM_BIO_SRC_IRQ);
+}
+
+static inline void wbsd_sg_to_dma(struct wbsd_host* host, struct mmc_data* data)
+{
+	unsigned int len, i, size;
+	struct scatterlist* sg;
+	char* dmabuf = host->dma_buffer;
+	char* sgbuf;
+	
+	size = host->size;
+	
+	sg = data->sg;
+	len = data->sg_len;
+	
+	/*
+	 * Just loop through all entries. Size might not
+	 * be the entire list though so make sure that
+	 * we do not transfer too much.
+	 */
+	for (i = 0;i < len;i++)
+	{
+		sgbuf = kmap_atomic(sg[i].page, KM_BIO_SRC_IRQ) + sg[i].offset;
+		if (size < sg[i].length)
+			memcpy(dmabuf, sgbuf, size);
+		else
+			memcpy(dmabuf, sgbuf, sg[i].length);
+		kunmap_atomic(sgbuf, KM_BIO_SRC_IRQ);
+		dmabuf += sg[i].length;
+		
+		if (size < sg[i].length)
+			size = 0;
+		else
+			size -= sg[i].length;
+	
+		if (size == 0)
+			break;
+	}
+	
+	/*
+	 * Check that we didn't get a request to transfer
+	 * more data than can fit into the SG list.
+	 */
+	
+	BUG_ON(size != 0);
+	
+	host->size -= size;
+}
+
+static inline void wbsd_dma_to_sg(struct wbsd_host* host, struct mmc_data* data)
+{
+	unsigned int len, i, size;
+	struct scatterlist* sg;
+	char* dmabuf = host->dma_buffer;
+	char* sgbuf;
+	
+	size = host->size;
+	
+	sg = data->sg;
+	len = data->sg_len;
+	
+	/*
+	 * Just loop through all entries. Size might not
+	 * be the entire list though so make sure that
+	 * we do not transfer too much.
+	 */
+	for (i = 0;i < len;i++)
+	{
+		sgbuf = kmap_atomic(sg[i].page, KM_BIO_SRC_IRQ) + sg[i].offset;
+		if (size < sg[i].length)
+			memcpy(sgbuf, dmabuf, size);
+		else
+			memcpy(sgbuf, dmabuf, sg[i].length);
+		kunmap_atomic(sgbuf, KM_BIO_SRC_IRQ);
+		dmabuf += sg[i].length;
+		
+		if (size < sg[i].length)
+			size = 0;
+		else
+			size -= sg[i].length;
+		
+		if (size == 0)
+			break;
+	}
+	
+	/*
+	 * Check that we didn't get a request to transfer
+	 * more data than can fit into the SG list.
+	 */
+	
+	BUG_ON(size != 0);
+	
+	host->size -= size;
+}
+
+/*
+ * Command handling
+ */
+ 
+static inline void wbsd_get_short_reply(struct wbsd_host* host,
+	struct mmc_command* cmd)
+{
+	/*
+	 * Correct response type?
+	 */
+	if (wbsd_read_index(host, WBSD_IDX_RSPLEN) != WBSD_RSP_SHORT)
+	{
+		cmd->error = MMC_ERR_INVALID;
+		return;
+	}
+	
+	cmd->resp[0] =
+		wbsd_read_index(host, WBSD_IDX_RESP12) << 24;
+	cmd->resp[0] |=
+		wbsd_read_index(host, WBSD_IDX_RESP13) << 16;
+	cmd->resp[0] |=
+		wbsd_read_index(host, WBSD_IDX_RESP14) << 8;
+	cmd->resp[0] |=
+		wbsd_read_index(host, WBSD_IDX_RESP15) << 0;
+	cmd->resp[1] =
+		wbsd_read_index(host, WBSD_IDX_RESP16) << 24;
+}
+
+static inline void wbsd_get_long_reply(struct wbsd_host* host,
+	struct mmc_command* cmd)
+{
+	int i;
+	
+	/*
+	 * Correct response type?
+	 */
+	if (wbsd_read_index(host, WBSD_IDX_RSPLEN) != WBSD_RSP_LONG)
+	{
+		cmd->error = MMC_ERR_INVALID;
+		return;
+	}
+	
+	for (i = 0;i < 4;i++)
+	{
+		cmd->resp[i] =
+			wbsd_read_index(host, WBSD_IDX_RESP1 + i * 4) << 24;
+		cmd->resp[i] |=
+			wbsd_read_index(host, WBSD_IDX_RESP2 + i * 4) << 16;
+		cmd->resp[i] |=
+			wbsd_read_index(host, WBSD_IDX_RESP3 + i * 4) << 8;
+		cmd->resp[i] |=
+			wbsd_read_index(host, WBSD_IDX_RESP4 + i * 4) << 0;
+	}
+}
+
+static irqreturn_t wbsd_irq(int irq, void *dev_id, struct pt_regs *regs);
+
+static void wbsd_send_command(struct wbsd_host* host, struct mmc_command* cmd)
+{
+	int i;
+	u8 status, isr;
+	
+	DBGF("Sending cmd (%x)\n", cmd->opcode);
+
+	/*
+	 * Clear accumulated ISR. The interrupt routine
+	 * will fill this one with events that occur during
+	 * transfer.
+	 */
+	host->isr = 0;
+	
+	/*
+	 * Send the command (CRC calculated by host).
+	 */
+	outb(cmd->opcode, host->base + WBSD_CMDR);
+	for (i = 3;i >= 0;i--)
+		outb((cmd->arg >> (i * 8)) & 0xff, host->base + WBSD_CMDR);
+	
+	cmd->error = MMC_ERR_NONE;
+	
+	/*
+	 * Wait for the request to complete.
+	 */
+	do {
+		status = wbsd_read_index(host, WBSD_IDX_STATUS);
+	} while (status & WBSD_CARDTRAFFIC);
+
+	/*
+	 * Do we expect a reply?
+	 */
+	if ((cmd->flags & MMC_RSP_MASK) != MMC_RSP_NONE)
+	{
+		/*
+		 * Read back status.
+		 */
+		isr = host->isr;
+		
+		/* Card removed? */
+		if (isr & WBSD_INT_CARD)
+			cmd->error = MMC_ERR_TIMEOUT;
+		/* Timeout? */
+		else if (isr & WBSD_INT_TIMEOUT)
+			cmd->error = MMC_ERR_TIMEOUT;
+		/* CRC? */
+		else if ((cmd->flags & MMC_RSP_CRC) && (isr & WBSD_INT_CRC))
+			cmd->error = MMC_ERR_BADCRC;
+		/* All ok */
+		else
+		{
+			if ((cmd->flags & MMC_RSP_MASK) == MMC_RSP_SHORT)
+				wbsd_get_short_reply(host, cmd);
+			else
+				wbsd_get_long_reply(host, cmd);
+		}
+	}
+
+	DBGF("Sent cmd (%x), res %d\n", cmd->opcode, cmd->error);
+}
+
+/*
+ * Data functions
+ */
+
+static void wbsd_empty_fifo(struct wbsd_host* host)
+{
+	struct mmc_data* data = host->mrq->cmd->data;
+	char* buffer;
+	int i, fsr, fifo;
+	
+	/*
+	 * Handle excessive data.
+	 */
+	if (data->bytes_xfered == host->size)
+		return;
+	
+	buffer = wbsd_kmap_sg(host) + host->offset;
+
+	/*
+	 * Drain the fifo. This has a tendency to loop longer
+	 * than the FIFO length (usually one block).
+	 */
+	while (!((fsr = inb(host->base + WBSD_FSR)) & WBSD_FIFO_EMPTY))
+	{
+		/*
+		 * The size field in the FSR is broken so we have to
+		 * do some guessing.
+		 */		
+		if (fsr & WBSD_FIFO_FULL)
+			fifo = 16;
+		else if (fsr & WBSD_FIFO_FUTHRE)
+			fifo = 8;
+		else
+			fifo = 1;
+		
+		for (i = 0;i < fifo;i++)
+		{
+			*buffer = inb(host->base + WBSD_DFR);
+			buffer++;
+			host->offset++;
+			host->remain--;
+
+			data->bytes_xfered++;
+			
+			/*
+			 * Transfer done?
+			 */
+			if (data->bytes_xfered == host->size)
+			{
+				wbsd_kunmap_sg(host);				
+				return;
+			}
+			
+			/*
+			 * End of scatter list entry?
+			 */
+			if (host->remain == 0)
+			{
+				wbsd_kunmap_sg(host);
+				
+				/*
+				 * Get next entry. Check if last.
+				 */
+				if (!wbsd_next_sg(host))
+				{
+					/*
+					 * We should never reach this point.
+					 * It means that we're trying to
+					 * transfer more blocks than can fit
+					 * into the scatter list.
+					 */
+					BUG_ON(1);
+					
+					host->size = data->bytes_xfered;
+					
+					return;
+				}
+				
+				buffer = wbsd_kmap_sg(host);
+			}
+		}
+	}
+	
+	wbsd_kunmap_sg(host);
+
+	/*
+	 * This is a very dirty hack to solve a
+	 * hardware problem. The chip doesn't trigger
+	 * FIFO threshold interrupts properly.
+	 */
+	if ((host->size - data->bytes_xfered) < 16)
+		tasklet_schedule(&host->fifo_tasklet);
+}
+
+static void wbsd_fill_fifo(struct wbsd_host* host)
+{
+	struct mmc_data* data = host->mrq->cmd->data;
+	char* buffer;
+	int i, fsr, fifo;
+	
+	/*
+	 * Check that we aren't being called after the
+	 * entire buffer has been transfered.
+	 */
+	if (data->bytes_xfered == host->size)
+		return;
+
+	buffer = wbsd_kmap_sg(host) + host->offset;
+
+	/*
+	 * Fill the fifo. This has a tendency to loop longer
+	 * than the FIFO length (usually one block).
+	 */
+	while (!((fsr = inb(host->base + WBSD_FSR)) & WBSD_FIFO_FULL))
+	{
+		/*
+		 * The size field in the FSR is broken so we have to
+		 * do some guessing.
+		 */		
+		if (fsr & WBSD_FIFO_EMPTY)
+			fifo = 0;
+		else if (fsr & WBSD_FIFO_EMTHRE)
+			fifo = 8;
+		else
+			fifo = 15;
+
+		for (i = 16;i > fifo;i--)
+		{
+			outb(*buffer, host->base + WBSD_DFR);
+			buffer++;
+			host->offset++;
+			host->remain--;
+			
+			data->bytes_xfered++;
+			
+			/*
+			 * Transfer done?
+			 */
+			if (data->bytes_xfered == host->size)
+			{
+				wbsd_kunmap_sg(host);
+				return;
+			}
+
+			/*
+			 * End of scatter list entry?
+			 */
+			if (host->remain == 0)
+			{
+				wbsd_kunmap_sg(host);
+				
+				/*
+				 * Get next entry. Check if last.
+				 */
+				if (!wbsd_next_sg(host))
+				{
+					/*
+					 * We should never reach this point.
+					 * It means that we're trying to
+					 * transfer more blocks than can fit
+					 * into the scatter list.
+					 */
+					BUG_ON(1);
+					
+					host->size = data->bytes_xfered;
+					
+					return;
+				}
+				
+				buffer = wbsd_kmap_sg(host);
+			}
+		}
+	}
+	
+	wbsd_kunmap_sg(host);
+}
+
+static void wbsd_prepare_data(struct wbsd_host* host, struct mmc_data* data)
+{
+	u16 blksize;
+	u8 setup;
+	unsigned long dmaflags;
+
+	DBGF("blksz %04x blks %04x flags %08x\n",
+		1 << data->blksz_bits, data->blocks, data->flags);
+	DBGF("tsac %d ms nsac %d clk\n",
+		data->timeout_ns / 1000000, data->timeout_clks);
+	
+	/*
+	 * Calculate size.
+	 */
+	host->size = data->blocks << data->blksz_bits;
+
+	/*
+	 * Check timeout values for overflow.
+	 * (Yes, some cards cause this value to overflow).
+	 */
+	if (data->timeout_ns > 127000000)
+		wbsd_write_index(host, WBSD_IDX_TAAC, 127);
+	else
+		wbsd_write_index(host, WBSD_IDX_TAAC, data->timeout_ns/1000000);
+	
+	if (data->timeout_clks > 255)
+		wbsd_write_index(host, WBSD_IDX_NSAC, 255);
+	else
+		wbsd_write_index(host, WBSD_IDX_NSAC, data->timeout_clks);
+	
+	/*
+	 * Inform the chip of how large blocks will be
+	 * sent. It needs this to determine when to
+	 * calculate CRC.
+	 *
+	 * Space for CRC must be included in the size.
+	 */
+	blksize = (1 << data->blksz_bits) + 2;
+	
+	wbsd_write_index(host, WBSD_IDX_PBSMSB, (blksize >> 4) & 0xF0);
+	wbsd_write_index(host, WBSD_IDX_PBSLSB, blksize & 0xFF);
+
+	/*
+	 * Clear the FIFO. This is needed even for DMA
+	 * transfers since the chip still uses the FIFO
+	 * internally.
+	 */
+	setup = wbsd_read_index(host, WBSD_IDX_SETUP);
+	setup |= WBSD_FIFO_RESET;
+	wbsd_write_index(host, WBSD_IDX_SETUP, setup);
+	
+	/*
+	 * DMA transfer?
+	 */
+	if (host->dma >= 0)
+	{	
+		/*
+		 * The buffer for DMA is only 64 kB.
+		 */
+		BUG_ON(host->size > 0x10000);
+		if (host->size > 0x10000)
+		{
+			data->error = MMC_ERR_INVALID;
+			return;
+		}
+		
+		/*
+		 * Transfer data from the SG list to
+		 * the DMA buffer.
+		 */
+		if (data->flags & MMC_DATA_WRITE)
+			wbsd_sg_to_dma(host, data);
+		
+		/*
+		 * Initialise the ISA DMA controller.
+		 */	
+		dmaflags = claim_dma_lock();
+		disable_dma(host->dma);
+		clear_dma_ff(host->dma);
+		if (data->flags & MMC_DATA_READ)
+			set_dma_mode(host->dma, DMA_MODE_READ & ~0x40);
+		else
+			set_dma_mode(host->dma, DMA_MODE_WRITE & ~0x40);
+		set_dma_addr(host->dma, host->dma_addr);
+		set_dma_count(host->dma, host->size);
+
+		enable_dma(host->dma);
+		release_dma_lock(dmaflags);
+
+		/*
+		 * Enable DMA on the host.
+		 */
+		wbsd_write_index(host, WBSD_IDX_DMA, WBSD_DMA_ENABLE);
+	}
+	else
+	{
+		/*
+		 * This flag is used to keep printk
+		 * output to a minimum.
+		 */
+		host->firsterr = 1;
+		
+		/*
+		 * Initialise the SG list.
+		 */
+		wbsd_init_sg(host, data);
+	
+		/*
+		 * Turn off DMA.
+		 */
+		wbsd_write_index(host, WBSD_IDX_DMA, 0);
+	
+		/*
+		 * Set up FIFO threshold levels (and fill
+		 * buffer if doing a write).
+		 */
+		if (data->flags & MMC_DATA_READ)
+		{
+			wbsd_write_index(host, WBSD_IDX_FIFOEN,
+				WBSD_FIFOEN_FULL | 8);
+		}
+		else
+		{
+			wbsd_write_index(host, WBSD_IDX_FIFOEN,
+				WBSD_FIFOEN_EMPTY | 8);
+			wbsd_fill_fifo(host);
+		}
+	}	
+		
+	data->error = MMC_ERR_NONE;
+}
+
+static void wbsd_finish_data(struct wbsd_host* host, struct mmc_data* data)
+{
+	unsigned long dmaflags;
+	int count;
+	u8 status;
+	
+	WARN_ON(host->mrq == NULL);
+
+	/*
+	 * Send a stop command if needed.
+	 */
+	if (data->stop)
+		wbsd_send_command(host, data->stop);
+
+	/*
+	 * Wait for the controller to leave data
+	 * transfer state.
+	 */
+	do
+	{
+		status = wbsd_read_index(host, WBSD_IDX_STATUS);
+	} while (status & (WBSD_BLOCK_READ | WBSD_BLOCK_WRITE));
+	
+	/*
+	 * DMA transfer?
+	 */
+	if (host->dma >= 0)
+	{
+		/*
+		 * Disable DMA on the host.
+		 */
+		wbsd_write_index(host, WBSD_IDX_DMA, 0);
+		
+		/*
+		 * Turn of ISA DMA controller.
+		 */
+		dmaflags = claim_dma_lock();
+		disable_dma(host->dma);
+		clear_dma_ff(host->dma);
+		count = get_dma_residue(host->dma);
+		release_dma_lock(dmaflags);
+		
+		/*
+		 * Any leftover data?
+		 */
+		if (count)
+		{
+			printk(KERN_ERR DRIVER_NAME ": Incomplete DMA "
+				"transfer. %d bytes left.\n", count);
+			
+			data->error = MMC_ERR_FAILED;
+		}
+		else
+		{
+			/*
+			 * Transfer data from DMA buffer to
+			 * SG list.
+			 */
+			if (data->flags & MMC_DATA_READ)
+				wbsd_dma_to_sg(host, data);
+			
+			data->bytes_xfered = host->size;
+		}
+	}
+	
+	DBGF("Ending data transfer (%d bytes)\n", data->bytes_xfered);
+	
+	wbsd_request_end(host, host->mrq);
+}
+
+/*
+ * MMC Callbacks
+ */
+
+static void wbsd_request(struct mmc_host* mmc, struct mmc_request* mrq)
+{
+	struct wbsd_host* host = mmc_priv(mmc);
+	struct mmc_command* cmd;
+
+	/*
+	 * Disable tasklets to avoid a deadlock.
+	 */
+	spin_lock_bh(&host->lock);
+
+	BUG_ON(host->mrq != NULL);
+
+	cmd = mrq->cmd;
+
+	host->mrq = mrq;
+	
+	/*
+	 * If there is no card in the slot then
+	 * timeout immediatly.
+	 */
+	if (!(inb(host->base + WBSD_CSR) & WBSD_CARDPRESENT))
+	{
+		cmd->error = MMC_ERR_TIMEOUT;
+		goto done;
+	}
+
+	/*
+	 * Does the request include data?
+	 */
+	if (cmd->data)
+	{
+		wbsd_prepare_data(host, cmd->data);
+		
+		if (cmd->data->error != MMC_ERR_NONE)
+			goto done;
+	}
+	
+	wbsd_send_command(host, cmd);
+
+	/*
+	 * If this is a data transfer the request
+	 * will be finished after the data has
+	 * transfered.
+	 */	
+	if (cmd->data && (cmd->error == MMC_ERR_NONE))
+	{
+		/*
+		 * Dirty fix for hardware bug.
+		 */
+		if (host->dma == -1)
+			tasklet_schedule(&host->fifo_tasklet);
+
+		spin_unlock_bh(&host->lock);
+
+		return;
+	}
+		
+done:
+	wbsd_request_end(host, mrq);
+
+	spin_unlock_bh(&host->lock);
+}
+
+static void wbsd_set_ios(struct mmc_host* mmc, struct mmc_ios* ios)
+{
+	struct wbsd_host* host = mmc_priv(mmc);
+	u8 clk, setup, pwr;
+	
+	DBGF("clock %uHz busmode %u powermode %u Vdd %u\n",
+		ios->clock, ios->bus_mode, ios->power_mode, ios->vdd);
+
+	spin_lock_bh(&host->lock);
+
+	/*
+	 * Reset the chip on each power off.
+	 * Should clear out any weird states.
+	 */
+	if (ios->power_mode == MMC_POWER_OFF)
+		wbsd_init_device(host);
+	
+	if (ios->clock >= 24000000)
+		clk = WBSD_CLK_24M;
+	else if (ios->clock >= 16000000)
+		clk = WBSD_CLK_16M;
+	else if (ios->clock >= 12000000)
+		clk = WBSD_CLK_12M;
+	else
+		clk = WBSD_CLK_375K;
+
+	/*
+	 * Only write to the clock register when
+	 * there is an actual change.
+	 */
+	if (clk != host->clk)
+	{
+		wbsd_write_index(host, WBSD_IDX_CLK, clk);
+		host->clk = clk;
+	}
+
+	if (ios->power_mode != MMC_POWER_OFF)
+	{
+		/*
+		 * Power up card.
+		 */
+		pwr = inb(host->base + WBSD_CSR);
+		pwr &= ~WBSD_POWER_N;
+		outb(pwr, host->base + WBSD_CSR);
+
+		/*
+		 * This behaviour is stolen from the
+		 * Windows driver. Don't know why, but
+		 * it is needed.
+		 */
+		setup = wbsd_read_index(host, WBSD_IDX_SETUP);
+		if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN)
+			setup |= WBSD_DAT3_H;
+		else
+			setup &= ~WBSD_DAT3_H;
+		wbsd_write_index(host, WBSD_IDX_SETUP, setup);
+
+		mdelay(1);
+	}
+
+	spin_unlock_bh(&host->lock);
+}
+
+/*
+ * Tasklets
+ */
+
+inline static struct mmc_data* wbsd_get_data(struct wbsd_host* host)
+{
+	WARN_ON(!host->mrq);
+	if (!host->mrq)
+		return NULL;
+
+	WARN_ON(!host->mrq->cmd);
+	if (!host->mrq->cmd)
+		return NULL;
+
+	WARN_ON(!host->mrq->cmd->data);
+	if (!host->mrq->cmd->data)
+		return NULL;
+	
+	return host->mrq->cmd->data;
+}
+
+static void wbsd_tasklet_card(unsigned long param)
+{
+	struct wbsd_host* host = (struct wbsd_host*)param;
+	u8 csr;
+	
+	spin_lock(&host->lock);
+	
+	csr = inb(host->base + WBSD_CSR);
+	WARN_ON(csr == 0xff);
+	
+	if (csr & WBSD_CARDPRESENT)
+		DBG("Card inserted\n");
+	else
+	{
+		DBG("Card removed\n");
+		
+		if (host->mrq)
+		{
+			printk(KERN_ERR DRIVER_NAME
+				": Card removed during transfer!\n");
+			wbsd_reset(host);
+			
+			host->mrq->cmd->error = MMC_ERR_FAILED;
+			tasklet_schedule(&host->finish_tasklet);
+		}
+	}
+	
+	/*
+	 * Unlock first since we might get a call back.
+	 */
+	spin_unlock(&host->lock);
+
+	mmc_detect_change(host->mmc);
+}
+
+static void wbsd_tasklet_fifo(unsigned long param)
+{
+	struct wbsd_host* host = (struct wbsd_host*)param;
+	struct mmc_data* data;
+	
+	spin_lock(&host->lock);
+		
+	if (!host->mrq)
+		goto end;
+	
+	data = wbsd_get_data(host);
+	if (!data)
+		goto end;
+
+	if (data->flags & MMC_DATA_WRITE)
+		wbsd_fill_fifo(host);
+	else
+		wbsd_empty_fifo(host);
+
+	/*
+	 * Done?
+	 */
+	if (host->size == data->bytes_xfered)
+	{
+		wbsd_write_index(host, WBSD_IDX_FIFOEN, 0);
+		tasklet_schedule(&host->finish_tasklet);
+	}
+
+end:	
+	spin_unlock(&host->lock);
+}
+
+static void wbsd_tasklet_crc(unsigned long param)
+{
+	struct wbsd_host* host = (struct wbsd_host*)param;
+	struct mmc_data* data;
+	
+	spin_lock(&host->lock);
+	
+	if (!host->mrq)
+		goto end;
+	
+	data = wbsd_get_data(host);
+	if (!data)
+		goto end;
+	
+	DBGF("CRC error\n");
+
+	data->error = MMC_ERR_BADCRC;
+	
+	tasklet_schedule(&host->finish_tasklet);
+
+end:		
+	spin_unlock(&host->lock);
+}
+
+static void wbsd_tasklet_timeout(unsigned long param)
+{
+	struct wbsd_host* host = (struct wbsd_host*)param;
+	struct mmc_data* data;
+	
+	spin_lock(&host->lock);
+	
+	if (!host->mrq)
+		goto end;
+	
+	data = wbsd_get_data(host);
+	if (!data)
+		goto end;
+	
+	DBGF("Timeout\n");
+
+	data->error = MMC_ERR_TIMEOUT;
+	
+	tasklet_schedule(&host->finish_tasklet);
+
+end:	
+	spin_unlock(&host->lock);
+}
+
+static void wbsd_tasklet_finish(unsigned long param)
+{
+	struct wbsd_host* host = (struct wbsd_host*)param;
+	struct mmc_data* data;
+	
+	spin_lock(&host->lock);
+	
+	WARN_ON(!host->mrq);
+	if (!host->mrq)
+		goto end;
+	
+	data = wbsd_get_data(host);
+	if (!data)
+		goto end;
+
+	wbsd_finish_data(host, data);
+	
+end:	
+	spin_unlock(&host->lock);
+}
+
+static void wbsd_tasklet_block(unsigned long param)
+{
+	struct wbsd_host* host = (struct wbsd_host*)param;
+	struct mmc_data* data;
+	
+	spin_lock(&host->lock);
+
+	if ((wbsd_read_index(host, WBSD_IDX_CRCSTATUS) & WBSD_CRC_MASK) !=
+		WBSD_CRC_OK)
+	{
+		data = wbsd_get_data(host);
+		if (!data)
+			goto end;
+		
+		DBGF("CRC error\n");
+
+		data->error = MMC_ERR_BADCRC;
+	
+		tasklet_schedule(&host->finish_tasklet);
+	}
+
+end:	
+	spin_unlock(&host->lock);
+}
+
+/*
+ * Interrupt handling
+ */
+
+static irqreturn_t wbsd_irq(int irq, void *dev_id, struct pt_regs *regs)
+{
+	struct wbsd_host* host = dev_id;
+	int isr;
+	
+	isr = inb(host->base + WBSD_ISR);
+
+	/*
+	 * Was it actually our hardware that caused the interrupt?
+	 */
+	if (isr == 0xff || isr == 0x00)
+		return IRQ_NONE;
+	
+	host->isr |= isr;
+
+	/*
+	 * Schedule tasklets as needed.
+	 */
+	if (isr & WBSD_INT_CARD)
+		tasklet_schedule(&host->card_tasklet);
+	if (isr & WBSD_INT_FIFO_THRE)
+		tasklet_schedule(&host->fifo_tasklet);
+	if (isr & WBSD_INT_CRC)
+		tasklet_hi_schedule(&host->crc_tasklet);
+	if (isr & WBSD_INT_TIMEOUT)
+		tasklet_hi_schedule(&host->timeout_tasklet);
+	if (isr & WBSD_INT_BUSYEND)
+		tasklet_hi_schedule(&host->block_tasklet);
+	if (isr & WBSD_INT_TC)
+		tasklet_schedule(&host->finish_tasklet);
+	
+	return IRQ_HANDLED;
+}
+
+/*
+ * Support functions for probe
+ */
+
+static int wbsd_scan(struct wbsd_host* host)
+{
+	int i, j, k;
+	int id;
+	
+	/*
+	 * Iterate through all ports, all codes to
+	 * find hardware that is in our known list.
+	 */
+	for (i = 0;i < sizeof(config_ports)/sizeof(int);i++)
+	{
+		if (!request_region(config_ports[i], 2, DRIVER_NAME))
+			continue;
+			
+		for (j = 0;j < sizeof(unlock_codes)/sizeof(int);j++)
+		{
+			id = 0xFFFF;
+			
+			outb(unlock_codes[j], config_ports[i]);
+			outb(unlock_codes[j], config_ports[i]);
+			
+			outb(WBSD_CONF_ID_HI, config_ports[i]);
+			id = inb(config_ports[i] + 1) << 8;
+
+			outb(WBSD_CONF_ID_LO, config_ports[i]);
+			id |= inb(config_ports[i] + 1);
+			
+			for (k = 0;k < sizeof(valid_ids)/sizeof(int);k++)
+			{
+				if (id == valid_ids[k])
+				{				
+					host->chip_id = id;
+					host->config = config_ports[i];
+					host->unlock_code = unlock_codes[i];
+				
+					return 0;
+				}
+			}
+			
+			if (id != 0xFFFF)
+			{
+				DBG("Unknown hardware (id %x) found at %x\n",
+					id, config_ports[i]);
+			}
+
+			outb(LOCK_CODE, config_ports[i]);
+		}
+		
+		release_region(config_ports[i], 2);
+	}
+	
+	return -ENODEV;
+}
+
+static int wbsd_request_regions(struct wbsd_host* host)
+{
+	if (io & 0x7)
+		return -EINVAL;
+	
+	if (!request_region(io, 8, DRIVER_NAME))
+		return -EIO;
+	
+	host->base = io;
+		
+	return 0;
+}
+
+static void wbsd_release_regions(struct wbsd_host* host)
+{
+	if (host->base)
+		release_region(host->base, 8);
+
+	if (host->config)
+		release_region(host->config, 2);
+}
+
+static void wbsd_init_dma(struct wbsd_host* host)
+{
+	host->dma = -1;
+	
+	if (dma < 0)
+		return;
+	
+	if (request_dma(dma, DRIVER_NAME))
+		goto err;
+	
+	/*
+	 * We need to allocate a special buffer in
+	 * order for ISA to be able to DMA to it.
+	 */
+	host->dma_buffer = kmalloc(65536,
+		GFP_NOIO | GFP_DMA | __GFP_REPEAT | __GFP_NOWARN);
+	if (!host->dma_buffer)
+		goto free;
+
+	/*
+	 * Translate the address to a physical address.
+	 */
+	host->dma_addr = isa_virt_to_bus(host->dma_buffer);
+			
+	/*
+	 * ISA DMA must be aligned on a 64k basis.
+	 */
+	if ((host->dma_addr & 0xffff) != 0)
+		goto kfree;
+	/*
+	 * ISA cannot access memory above 16 MB.
+	 */
+	else if (host->dma_addr >= 0x1000000)
+		goto kfree;
+
+	host->dma = dma;
+	
+	return;
+	
+kfree:
+	/*
+	 * If we've gotten here then there is some kind of alignment bug
+	 */
+	BUG_ON(1);
+	
+	kfree(host->dma_buffer);
+	host->dma_buffer = NULL;
+
+free:
+	free_dma(dma);
+
+err:
+	printk(KERN_WARNING DRIVER_NAME ": Unable to allocate DMA %d. "
+		"Falling back on FIFO.\n", dma);
+}
+
+static struct mmc_host_ops wbsd_ops = {
+	.request	= wbsd_request,
+	.set_ios	= wbsd_set_ios,
+};
+
+/*
+ * Device probe
+ */
+
+static int wbsd_probe(struct device* dev)
+{
+	struct wbsd_host* host = NULL;
+	struct mmc_host* mmc = NULL;
+	int ret;
+	
+	/*
+	 * Allocate MMC structure.
+	 */
+	mmc = mmc_alloc_host(sizeof(struct wbsd_host), dev);
+	if (!mmc)
+		return -ENOMEM;
+	
+	host = mmc_priv(mmc);
+	host->mmc = mmc;
+	
+	/*
+	 * Scan for hardware.
+	 */
+	ret = wbsd_scan(host);
+	if (ret)
+		goto freemmc;
+
+	/*
+	 * Reset the chip.
+	 */	
+	wbsd_write_config(host, WBSD_CONF_SWRST, 1);
+	wbsd_write_config(host, WBSD_CONF_SWRST, 0);
+
+	/*
+	 * Allocate I/O ports.
+	 */
+	ret = wbsd_request_regions(host);
+	if (ret)
+		goto release;
+
+	/*
+	 * Set host parameters.
+	 */
+	mmc->ops = &wbsd_ops;
+	mmc->f_min = 375000;
+	mmc->f_max = 24000000;
+	mmc->ocr_avail = MMC_VDD_32_33|MMC_VDD_33_34;
+	
+	spin_lock_init(&host->lock);
+
+	/*
+	 * Select SD/MMC function.
+	 */
+	wbsd_write_config(host, WBSD_CONF_DEVICE, DEVICE_SD);
+	
+	/*
+	 * Set up card detection.
+	 */
+	wbsd_write_config(host, WBSD_CONF_PINS, 0x02);
+	
+	/*
+	 * Configure I/O port.
+	 */
+	wbsd_write_config(host, WBSD_CONF_PORT_HI, host->base >> 8);
+	wbsd_write_config(host, WBSD_CONF_PORT_LO, host->base & 0xff);
+
+	/*
+	 * Allocate interrupt.
+	 */
+	ret = request_irq(irq, wbsd_irq, SA_SHIRQ, DRIVER_NAME, host);
+	if (ret)
+		goto release;
+	
+	host->irq = irq;
+	
+	/*
+	 * Set up tasklets.
+	 */
+	tasklet_init(&host->card_tasklet, wbsd_tasklet_card, (unsigned long)host);
+	tasklet_init(&host->fifo_tasklet, wbsd_tasklet_fifo, (unsigned long)host);
+	tasklet_init(&host->crc_tasklet, wbsd_tasklet_crc, (unsigned long)host);
+	tasklet_init(&host->timeout_tasklet, wbsd_tasklet_timeout, (unsigned long)host);
+	tasklet_init(&host->finish_tasklet, wbsd_tasklet_finish, (unsigned long)host);
+	tasklet_init(&host->block_tasklet, wbsd_tasklet_block, (unsigned long)host);
+	
+	/*
+	 * Configure interrupt.
+	 */
+	wbsd_write_config(host, WBSD_CONF_IRQ, host->irq);
+	
+	/*
+	 * Allocate DMA.
+	 */
+	wbsd_init_dma(host);
+	
+	/*
+	 * If all went well, then configure DMA.
+	 */
+	if (host->dma >= 0)
+		wbsd_write_config(host, WBSD_CONF_DRQ, host->dma);
+	
+	/*
+	 * Maximum number of segments. Worst case is one sector per segment
+	 * so this will be 64kB/512.
+	 */
+	mmc->max_hw_segs = 128;
+	mmc->max_phys_segs = 128;
+	
+	/*
+	 * Maximum number of sectors in one transfer. Also limited by 64kB
+	 * buffer.
+	 */
+	mmc->max_sectors = 128;
+	
+	/*
+	 * Maximum segment size. Could be one segment with the maximum number
+	 * of segments.
+	 */
+	mmc->max_seg_size = mmc->max_sectors * 512;
+	
+	/*
+	 * Enable chip.
+	 */
+	wbsd_write_config(host, WBSD_CONF_ENABLE, 1);
+	
+	/*
+	 * Power up chip.
+	 */
+	wbsd_write_config(host, WBSD_CONF_POWER, 0x20);
+	
+	/*
+	 * Power Management stuff. No idea how this works.
+	 * Not tested.
+	 */
+#ifdef CONFIG_PM
+	wbsd_write_config(host, WBSD_CONF_PME, 0xA0);
+#endif
+
+	/*
+	 * Reset the chip into a known state.
+	 */
+	wbsd_init_device(host);
+	
+	dev_set_drvdata(dev, mmc);
+	
+	/*
+	 * Add host to MMC layer.
+	 */
+	mmc_add_host(mmc);
+
+	printk(KERN_INFO "%s: W83L51xD id %x at 0x%x irq %d dma %d\n",
+		mmc->host_name, (int)host->chip_id, (int)host->base,
+		(int)host->irq, (int)host->dma);
+
+	return 0;
+
+release:
+	wbsd_release_regions(host);
+
+freemmc:
+	mmc_free_host(mmc);
+
+	return ret;
+}
+
+/*
+ * Device remove
+ */
+
+static int wbsd_remove(struct device* dev)
+{
+	struct mmc_host* mmc = dev_get_drvdata(dev);
+	struct wbsd_host* host;
+	
+	if (!mmc)
+		return 0;
+
+	host = mmc_priv(mmc);
+	
+	/*
+	 * Unregister host with MMC layer.
+	 */
+	mmc_remove_host(mmc);
+
+	/*
+	 * Power down the SD/MMC function.
+	 */
+	wbsd_unlock_config(host);
+	wbsd_write_config(host, WBSD_CONF_DEVICE, DEVICE_SD);
+	wbsd_write_config(host, WBSD_CONF_ENABLE, 0);
+	wbsd_lock_config(host);
+	
+	/*
+	 * Free resources.
+	 */
+	if (host->dma_buffer)
+		kfree(host->dma_buffer);
+	
+	if (host->dma >= 0)
+		free_dma(host->dma);
+
+	free_irq(host->irq, host);
+	
+	tasklet_kill(&host->card_tasklet);
+	tasklet_kill(&host->fifo_tasklet);
+	tasklet_kill(&host->crc_tasklet);
+	tasklet_kill(&host->timeout_tasklet);
+	tasklet_kill(&host->finish_tasklet);
+	tasklet_kill(&host->block_tasklet);
+	
+	wbsd_release_regions(host);
+	
+	mmc_free_host(mmc);
+
+	return 0;
+}
+
+/*
+ * Power management
+ */
+
+#ifdef CONFIG_PM
+static int wbsd_suspend(struct device *dev, u32 state, u32 level)
+{
+	DBGF("Not yet supported\n");
+
+	return 0;
+}
+
+static int wbsd_resume(struct device *dev, u32 level)
+{
+	DBGF("Not yet supported\n");
+
+	return 0;
+}
+#else
+#define wbsd_suspend NULL
+#define wbsd_resume NULL
+#endif
+
+static void wbsd_release(struct device *dev)
+{
+}
+
+static struct platform_device wbsd_device = {
+	.name		= DRIVER_NAME,
+	.id			= -1,
+	.dev		= {
+		.release = wbsd_release,
+	},
+};
+
+static struct device_driver wbsd_driver = {
+	.name		= DRIVER_NAME,
+	.bus		= &platform_bus_type,
+	.probe		= wbsd_probe,
+	.remove		= wbsd_remove,
+	
+	.suspend	= wbsd_suspend,
+	.resume		= wbsd_resume,
+};
+
+/*
+ * Module loading/unloading
+ */
+
+static int __init wbsd_drv_init(void)
+{
+	int result;
+	
+	printk(KERN_INFO DRIVER_NAME
+		": Winbond W83L51xD SD/MMC card interface driver, "
+		DRIVER_VERSION "\n");
+	printk(KERN_INFO DRIVER_NAME ": Copyright(c) Pierre Ossman\n");
+	
+	result = driver_register(&wbsd_driver);
+	if (result < 0)
+		return result;
+
+	result = platform_device_register(&wbsd_device);
+	if (result < 0)
+		return result;
+
+	return 0;
+}
+
+static void __exit wbsd_drv_exit(void)
+{
+	platform_device_unregister(&wbsd_device);
+	
+	driver_unregister(&wbsd_driver);
+
+	DBG("unloaded\n");
+}
+
+module_init(wbsd_drv_init);
+module_exit(wbsd_drv_exit);
+module_param(io, uint, 0444);
+module_param(irq, uint, 0444);
+module_param(dma, int, 0444);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Winbond W83L51xD SD/MMC card interface driver");
+MODULE_VERSION(DRIVER_VERSION);
+
+MODULE_PARM_DESC(io, "I/O base to allocate. Must be 8 byte aligned. (default 0x248)");
+MODULE_PARM_DESC(irq, "IRQ to allocate. (default 6)");
+MODULE_PARM_DESC(dma, "DMA channel to allocate. -1 for no DMA. (default 2)");
diff --git a/drivers/mmc/wbsd.h b/drivers/mmc/wbsd.h
new file mode 100644
index 00000000000..fdc03b56a81
--- /dev/null
+++ b/drivers/mmc/wbsd.h
@@ -0,0 +1,178 @@
+/*
+ *  linux/drivers/mmc/wbsd.h - Winbond W83L51xD SD/MMC driver
+ *
+ *  Copyright (C) 2004-2005 Pierre Ossman, All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+const int config_ports[] = { 0x2E, 0x4E };
+const int unlock_codes[] = { 0x83, 0x87 };
+
+const int valid_ids[] = {
+	0x7112,
+	};
+
+#define LOCK_CODE		0xAA
+
+#define WBSD_CONF_SWRST		0x02
+#define WBSD_CONF_DEVICE	0x07
+#define WBSD_CONF_ID_HI		0x20
+#define WBSD_CONF_ID_LO		0x21
+#define WBSD_CONF_POWER		0x22
+#define WBSD_CONF_PME		0x23
+#define WBSD_CONF_PMES		0x24
+
+#define WBSD_CONF_ENABLE	0x30
+#define WBSD_CONF_PORT_HI	0x60
+#define WBSD_CONF_PORT_LO	0x61
+#define WBSD_CONF_IRQ		0x70
+#define WBSD_CONF_DRQ		0x74
+
+#define WBSD_CONF_PINS		0xF0
+
+#define DEVICE_SD		0x03
+
+#define WBSD_CMDR		0x00
+#define WBSD_DFR		0x01
+#define WBSD_EIR		0x02
+#define WBSD_ISR		0x03
+#define WBSD_FSR		0x04
+#define WBSD_IDXR		0x05
+#define WBSD_DATAR		0x06
+#define WBSD_CSR		0x07
+
+#define WBSD_EINT_CARD		0x40
+#define WBSD_EINT_FIFO_THRE	0x20
+#define WBSD_EINT_CCRC		0x10
+#define WBSD_EINT_TIMEOUT	0x08
+#define WBSD_EINT_PROGEND	0x04
+#define WBSD_EINT_CRC		0x02
+#define WBSD_EINT_TC		0x01
+
+#define WBSD_INT_PENDING	0x80
+#define WBSD_INT_CARD		0x40
+#define WBSD_INT_FIFO_THRE	0x20
+#define WBSD_INT_CRC		0x10
+#define WBSD_INT_TIMEOUT	0x08
+#define WBSD_INT_PROGEND	0x04
+#define WBSD_INT_BUSYEND	0x02
+#define WBSD_INT_TC		0x01
+
+#define WBSD_FIFO_EMPTY		0x80
+#define WBSD_FIFO_FULL		0x40
+#define WBSD_FIFO_EMTHRE	0x20
+#define WBSD_FIFO_FUTHRE	0x10
+#define WBSD_FIFO_SZMASK	0x0F
+
+#define WBSD_MSLED		0x20
+#define WBSD_POWER_N		0x10
+#define WBSD_WRPT		0x04
+#define WBSD_CARDPRESENT	0x01
+
+#define WBSD_IDX_CLK		0x01
+#define WBSD_IDX_PBSMSB		0x02
+#define WBSD_IDX_TAAC		0x03
+#define WBSD_IDX_NSAC		0x04
+#define WBSD_IDX_PBSLSB		0x05
+#define WBSD_IDX_SETUP		0x06
+#define WBSD_IDX_DMA		0x07
+#define WBSD_IDX_FIFOEN		0x08
+#define WBSD_IDX_STATUS		0x10
+#define WBSD_IDX_RSPLEN		0x1E
+#define WBSD_IDX_RESP0		0x1F
+#define WBSD_IDX_RESP1		0x20
+#define WBSD_IDX_RESP2		0x21
+#define WBSD_IDX_RESP3		0x22
+#define WBSD_IDX_RESP4		0x23
+#define WBSD_IDX_RESP5		0x24
+#define WBSD_IDX_RESP6		0x25
+#define WBSD_IDX_RESP7		0x26
+#define WBSD_IDX_RESP8		0x27
+#define WBSD_IDX_RESP9		0x28
+#define WBSD_IDX_RESP10		0x29
+#define WBSD_IDX_RESP11		0x2A
+#define WBSD_IDX_RESP12		0x2B
+#define WBSD_IDX_RESP13		0x2C
+#define WBSD_IDX_RESP14		0x2D
+#define WBSD_IDX_RESP15		0x2E
+#define WBSD_IDX_RESP16		0x2F
+#define WBSD_IDX_CRCSTATUS	0x30
+#define WBSD_IDX_ISR		0x3F
+
+#define WBSD_CLK_375K		0x00
+#define WBSD_CLK_12M		0x01
+#define WBSD_CLK_16M		0x02
+#define WBSD_CLK_24M		0x03
+
+#define WBSD_DAT3_H		0x08
+#define WBSD_FIFO_RESET		0x04
+#define WBSD_SOFT_RESET		0x02
+#define WBSD_INC_INDEX		0x01
+
+#define WBSD_DMA_SINGLE		0x02
+#define WBSD_DMA_ENABLE		0x01
+
+#define WBSD_FIFOEN_EMPTY	0x20
+#define WBSD_FIFOEN_FULL	0x10
+#define WBSD_FIFO_THREMASK	0x0F
+
+#define WBSD_BLOCK_READ		0x80
+#define WBSD_BLOCK_WRITE	0x40
+#define WBSD_BUSY		0x20
+#define WBSD_CARDTRAFFIC	0x04
+#define WBSD_SENDCMD		0x02
+#define WBSD_RECVRES		0x01
+
+#define WBSD_RSP_SHORT		0x00
+#define WBSD_RSP_LONG		0x01
+
+#define WBSD_CRC_MASK		0x1F
+#define WBSD_CRC_OK		0x05 /* S010E (00101) */
+#define WBSD_CRC_FAIL		0x0B /* S101E (01011) */
+
+
+struct wbsd_host
+{
+	struct mmc_host*	mmc;		/* MMC structure */
+	
+	spinlock_t		lock;		/* Mutex */
+
+	struct mmc_request*	mrq;		/* Current request */
+	
+	u8			isr;		/* Accumulated ISR */
+	
+	struct scatterlist*	cur_sg;		/* Current SG entry */
+	unsigned int		num_sg;		/* Number of entries left */
+	void*			mapped_sg;	/* vaddr of mapped sg */
+	
+	unsigned int		offset;		/* Offset into current entry */
+	unsigned int		remain;		/* Data left in curren entry */
+
+	int			size;		/* Total size of transfer */
+	
+	char*			dma_buffer;	/* ISA DMA buffer */
+	dma_addr_t		dma_addr;	/* Physical address for same */
+
+	int			firsterr;	/* See fifo functions */
+	
+	u8			clk;		/* Current clock speed */
+	
+	int			config;		/* Config port */
+	u8			unlock_code;	/* Code to unlock config */
+
+	int			chip_id;	/* ID of controller */
+	
+	int			base;		/* I/O port base */
+	int			irq;		/* Interrupt */
+	int			dma;		/* DMA channel */
+	
+	struct tasklet_struct	card_tasklet;	/* Tasklet structures */
+	struct tasklet_struct	fifo_tasklet;
+	struct tasklet_struct	crc_tasklet;
+	struct tasklet_struct	timeout_tasklet;
+	struct tasklet_struct	finish_tasklet;
+	struct tasklet_struct	block_tasklet;
+};